Regna, the Redeemer (Card)

Regna, the Redeemer
In 4093 decks 0% of 2313598 decks
Jubilee Finnegan
Mar 25, 2024
Mechanical Memories - Searching for a Partner
Jubilee gives us a historical look into the Partner mechanic and its usefulness in Commander.
Philomène Gatien
Jan 25, 2022
Do Your Worst - Mono-White Spellslinger
Mono-white spellslinger? That can't be a thing... right? Right!?
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Teysa Karlov
3.40% of 15791 decks 537 decks
Patron of the Kitsune
43.71% of 469 decks 205 decks
The Gaffer
24.14% of 671 decks 162 decks
Oloro, Ageless Ascetic
1.05% of 12508 decks 131 decks
Kaalia of the Vast
0.59% of 21269 decks 125 decks
Liesa, Shroud of Dusk
1.13% of 9596 decks 108 decks
Karlov of the Ghost Council
2.64% of 4020 decks 106 decks
Jodah, the Unifier
0.56% of 17928 decks 101 decks
Elas il-Kor, Sadistic Pilgrim
1.42% of 6530 decks 93 decks
Bilbo, Birthday Celebrant
1.57% of 5409 decks 85 decks
Thalisse, Reverent Medium
3.66% of 1910 decks 70 decks
Giada, Font of Hope
0.39% of 18010 decks 70 decks
Elenda, the Dusk Rose
1.29% of 5436 decks 70 decks
Heliod, Sun-Crowned
1.91% of 3568 decks 68 decks
Rodolf Duskbringer
4.09% of 1615 decks 66 decks
Teysa, Orzhov Scion
2.13% of 2770 decks 59 decks
Shilgengar, Sire of Famine
1.31% of 4206 decks 55 decks
Ayli, Eternal Pilgrim
4.04% of 1262 decks 51 decks
New Cards
Dazzling Angel
68% of 56 decks +32% synergy
Exemplar of Light
63% of 218 decks +53% synergy
Elenda, Saint of Dusk
36% of 50 decks +12% synergy
Infestation Sage
33% of 33 decks +12% synergy
Enduring Vitality
23% of 56 decks +4% synergy
High Synergy Cards
Krav, the Unredeemed
84% of 3008 decks +84% synergy
Jenny Flint
59% of 177 decks +59% synergy
Pako, Arcane Retriever
57% of 329 decks +56% synergy
Madame Vastra
55% of 193 decks +55% synergy
Ukkima, Stalking Shadow
40% of 524 decks +39% synergy
Shabraz, the Skyshark
36% of 667 decks +35% synergy
Silvar, Devourer of the Free
35% of 563 decks +35% synergy
Toothy, Imaginary Friend
35% of 679 decks +35% synergy
Soul Warden
40% of 4093 decks +34% synergy
Pippin, Warden of Isengard
37% of 424 decks +34% synergy
Top Cards
Swords to Plowshares
59% of 4093 decks -3% synergy
Path to Exile
42% of 4093 decks -4% synergy
Cultivate
39% of 891 decks -7% synergy
Farseek
39% of 891 decks +5% synergy
Blood Artist
39% of 3008 decks +27% synergy
Elas il-Kor, Sadistic Pilgrim
39% of 2602 decks +28% synergy
Zulaport Cutthroat
37% of 3008 decks +27% synergy
Anguished Unmaking
36% of 3008 decks +12% synergy
Essence Warden
33% of 891 decks +31% synergy
Annie Joins Up
33% of 110 decks +15% synergy
Creatures
Cruel Celebrant
33% of 2957 decks +24% synergy
Soul's Attendant
32% of 4093 decks +29% synergy
Merry, Warden of Isengard
30% of 539 decks +28% synergy
Laurine, the Diversion
29% of 611 decks +29% synergy
Brallin, Skyshark Rider
29% of 640 decks +28% synergy
Sam, Loyal Attendant
28% of 625 decks +26% synergy
Timin, Youthful Geist
28% of 647 decks +28% synergy
Haldan, Avid Arcanist
28% of 667 decks +28% synergy
Owen Grady, Raptor Trainer
27% of 150 decks +27% synergy
Okaun, Eye of Chaos
27% of 655 decks +27% synergy
Elenda, the Dusk Rose
27% of 3008 decks +22% synergy
Viscera Seer
27% of 3008 decks +18% synergy
Zndrsplt, Eye of Wisdom
27% of 679 decks +27% synergy
Pitiless Plunderer
27% of 3008 decks +19% synergy
Crested Sunmare
27% of 4093 decks +26% synergy
Blue, Loyal Raptor
27% of 154 decks +27% synergy
Pir, Imaginative Rascal
27% of 891 decks +26% synergy
Vito, Thorn of the Dusk Rose
26% of 2894 decks +20% synergy
Elenda's Hierophant
24% of 1673 decks +22% synergy
Cazur, Ruthless Stalker
24% of 878 decks +24% synergy
Gorm the Great
24% of 891 decks +24% synergy
Evie Frye
24% of 120 decks +23% synergy
Yannik, Scavenging Sentinel
24% of 878 decks +24% synergy
Dina, Soul Steeper
24% of 670 decks +21% synergy
Khorvath Brightflame
24% of 655 decks +24% synergy
Archangel of Thune
22% of 4093 decks +20% synergy
Valkyrie Harbinger
22% of 3911 decks +20% synergy
Vanguard Seraph
21% of 56 decks +13% synergy
Suture Priest
21% of 4093 decks +18% synergy
Starscape Cleric
21% of 387 decks +17% synergy
Mirkwood Bats
21% of 1806 decks +9% synergy
Fiendish Panda
21% of 82 decks +16% synergy
Kambal, Profiteering Mayor
21% of 853 decks +12% synergy
Drogskol Reaver
21% of 679 decks +19% synergy
Teysa Karlov
20% of 2991 decks +16% synergy
Birds of Paradise
20% of 891 decks -7% synergy
Lathiel, the Bounteous Dawn
20% of 873 decks +19% synergy
Gwaihir, Greatest of the Eagles
20% of 2395 decks +19% synergy
Sakura-Tribe Elder
20% of 891 decks +2% synergy
Gisela, Blade of Goldnight
20% of 655 decks +14% synergy
The Gaffer
20% of 2395 decks +17% synergy
Beledros Witherbloom
20% of 670 decks +16% synergy
Sunscorch Regent
20% of 4093 decks +17% synergy
Resplendent Angel
20% of 4081 decks +18% synergy
Solemn Simulacrum
20% of 4093 decks +6% synergy
Kambal, Consul of Allocation
19% of 3008 decks +14% synergy
Bloodthirsty Conqueror
19% of 152 decks +8% synergy
Daxos, Blessed by the Sun
19% of 4002 decks +16% synergy
Teysa, Orzhov Scion
19% of 3008 decks +17% synergy
Ocelot Pride
18% of 850 decks +13% synergy
Instants
Generous Gift
29% of 4032 decks +4% synergy
Beast Within
29% of 891 decks -10% synergy
Despark
24% of 2957 decks +9% synergy
Counterspell
24% of 679 decks -19% synergy
Mortify
21% of 3008 decks +9% synergy
Heroic Intervention
19% of 891 decks -11% synergy
Assassin's Trophy
19% of 688 decks -12% synergy
Stroke of Midnight
18% of 2098 decks +5% synergy
Teferi's Protection
17% of 4093 decks -3% synergy
Void Rend
17% of 501 decks +2% synergy
Cyclonic Rift
16% of 679 decks -12% synergy
Boros Charm
16% of 655 decks -9% synergy
Utter End
16% of 3008 decks +9% synergy
Inkshield
15% of 2825 decks +10% synergy
Village Rites
15% of 2894 decks +5% synergy
Fracture
14% of 2825 decks +7% synergy
Heliod's Intervention
13% of 4002 decks +10% synergy
Mortality Spear
13% of 670 decks +11% synergy
Arcane Denial
13% of 679 decks -6% synergy
Deadly Dispute
13% of 2791 decks +2% synergy
Fell the Profane
13% of 700 decks +1% synergy
Terminate
13% of 577 decks -8% synergy
Dovin's Veto
12% of 670 decks -7% synergy
Chaos Warp
12% of 655 decks -20% synergy
Negate
12% of 679 decks -11% synergy
Dawn's Truce
11% of 618 decks -4% synergy
March of the Multitudes
11% of 884 decks +7% synergy
Mythos of Nethroi
11% of 683 decks +8% synergy
Plumb the Forbidden
10% of 2825 decks +7% synergy
Flawless Maneuver
10% of 3992 decks -0% synergy
Flare of Fortitude
10% of 981 decks +4% synergy
Crackling Doom
9% of 577 decks +2% synergy
Malakir Rebirth
9% of 2883 decks +1% synergy
An Offer You Can't Refuse
9% of 639 decks -13% synergy
Return to Dust
8% of 4093 decks +4% synergy
Enlightened Tutor
8% of 4093 decks -9% synergy
Akroma's Will
8% of 3944 decks -1% synergy
Revitalizing Repast
8% of 157 decks -4% synergy
Vampiric Tutor
8% of 3008 decks -10% synergy
Reprieve
8% of 2839 decks +3% synergy
Sphinx's Revelation
8% of 679 decks +5% synergy
Desynchronization
7% of 111 decks +3% synergy
Dark Ritual
7% of 3008 decks -15% synergy
Divine Resilience
7% of 113 decks +3% synergy
Absorb
7% of 679 decks +5% synergy
Brainstorm
7% of 679 decks -14% synergy
Corrupted Conviction
7% of 1935 decks +1% synergy
Fierce Guardianship
7% of 667 decks -11% synergy
Growth Spiral
7% of 357 decks -15% synergy
Secure the Wastes
7% of 4093 decks +4% synergy
Sorceries
Kodama's Reach
28% of 891 decks -3% synergy
Rampant Growth
27% of 891 decks -7% synergy
Nature's Lore
27% of 891 decks -5% synergy
Damn
24% of 2806 decks +8% synergy
Three Visits
23% of 891 decks -2% synergy
Ruinous Ultimatum
22% of 563 decks +4% synergy
Fumigate
20% of 4093 decks +16% synergy
Blasphemous Edict
18% of 82 decks -15% synergy
Austere Command
18% of 4093 decks +5% synergy
Blasphemous Act
15% of 655 decks -19% synergy
Victimize
14% of 3008 decks +3% synergy
Demonic Tutor
14% of 3008 decks -8% synergy
Kaya's Wrath
13% of 2991 decks +10% synergy
Vindicate
12% of 3008 decks +6% synergy
Eerie Ultimatum
12% of 683 decks -0% synergy
Farewell
12% of 3764 decks -2% synergy
Merciless Eviction
11% of 3008 decks +7% synergy
Toxic Deluge
11% of 3008 decks -6% synergy
Diabolic Intent
11% of 3008 decks +2% synergy
Raise the Past
11% of 113 decks +0% synergy
Read the Bones
10% of 3008 decks +2% synergy
Sign in Blood
10% of 3008 decks +0% synergy
Debt to the Deathless
10% of 3008 decks +7% synergy
Supreme Verdict
9% of 679 decks -5% synergy
Skyshroud Claim
9% of 891 decks +0% synergy
Rite of Oblivion
9% of 2782 decks +6% synergy
Storm Herd
8% of 4093 decks +7% synergy
Night's Whisper
8% of 3008 decks -1% synergy
Martial Coup
8% of 4093 decks +5% synergy
Exsanguinate
8% of 3008 decks +2% synergy
Wrath of God
8% of 4093 decks +1% synergy
Harmonize
8% of 891 decks -1% synergy
Reanimate
7% of 3008 decks -8% synergy
Shamanic Revelation
7% of 891 decks -2% synergy
Windfall
7% of 679 decks -6% synergy
Faithless Looting
7% of 655 decks -10% synergy
Primevals' Glorious Rebirth
7% of 3008 decks +3% synergy
Vandalblast
7% of 655 decks -9% synergy
Tempt with Bunnies
7% of 508 decks +2% synergy
Diabolic Tutor
7% of 3008 decks +0% synergy
Bala Ged Recovery
7% of 875 decks -2% synergy
White Sun's Twilight
7% of 3181 decks +3% synergy
Sevinne's Reclamation
6% of 4019 decks -1% synergy
Cleansing Nova
6% of 4081 decks +3% synergy
Pest Infestation
6% of 862 decks +4% synergy
The Battle of Bywater
6% of 2465 decks +4% synergy
Living Death
6% of 3008 decks +1% synergy
Approach of the Second Sun
6% of 4093 decks +2% synergy
Camaraderie
6% of 884 decks +3% synergy
Kamahl's Druidic Vow
5% of 891 decks +5% synergy
Utility Artifacts
Skullclamp
28% of 4093 decks +16% synergy
Well of Lost Dreams
25% of 4093 decks +24% synergy
Aetherflux Reservoir
22% of 4093 decks +18% synergy
Ashnod's Altar
22% of 4093 decks +14% synergy
Bolas's Citadel
21% of 2957 decks +12% synergy
Lightning Greaves
18% of 4093 decks -7% synergy
Swiftfoot Boots
18% of 4093 decks -10% synergy
Wayfarer's Bauble
18% of 4093 decks +8% synergy
Oketra's Monument
15% of 4093 decks +14% synergy
Alhammarret's Archive
14% of 4093 decks +12% synergy
Cosmos Elixir
14% of 3911 decks +13% synergy
The Book of Exalted Deeds
14% of 3847 decks +12% synergy
Phyrexian Altar
11% of 4093 decks +7% synergy
Pearl Medallion
10% of 4093 decks +8% synergy
Caduceus, Staff of Hermes
9% of 734 decks +5% synergy
The Great Henge
9% of 878 decks -1% synergy
Archaeomancer's Map
8% of 3886 decks +4% synergy
Marina Vendrell's Grimoire
8% of 39 decks +6% synergy
Whip of Erebos
6% of 3008 decks +2% synergy
The One Ring
6% of 2848 decks -3% synergy
Sword of the Animist
5% of 4093 decks +0% synergy
Enchantments
Smothering Tithe
29% of 4075 decks +5% synergy
Bastion of Remembrance
27% of 2915 decks +20% synergy
Cleric Class
23% of 3847 decks +20% synergy
Angelic Accord
22% of 4093 decks +21% synergy
Sanguine Bond
22% of 3008 decks +17% synergy
Lunar Convocation
22% of 413 decks +15% synergy
Authority of the Consuls
21% of 4093 decks +17% synergy
Gourmand's Talent
21% of 96 decks +19% synergy
Phyrexian Arena
20% of 3008 decks +5% synergy
Kellan Joins Up
19% of 110 decks +16% synergy
Dawn of Hope
18% of 4077 decks +16% synergy
Rakdos Joins Up
16% of 176 decks +12% synergy
Anointed Procession
16% of 4093 decks +7% synergy
Griffin Aerie
16% of 3970 decks +15% synergy
Rhystic Study
15% of 679 decks -12% synergy
Black Market Connections
15% of 2646 decks +4% synergy
Vraska Joins Up
15% of 198 decks +9% synergy
Exquisite Blood
14% of 3008 decks +9% synergy
Blind Obedience
14% of 4093 decks +7% synergy
Dictate of Erebos
14% of 3008 decks +10% synergy
Black Market
13% of 3008 decks +8% synergy
Caretaker's Talent
13% of 508 decks +1% synergy
Leyline of Hope
12% of 655 decks +11% synergy
Funeral Room // Awakening Hall
12% of 243 decks +7% synergy
Grave Pact
12% of 3008 decks +7% synergy
The Meathook Massacre
11% of 2782 decks +6% synergy
Bitterblossom
11% of 3008 decks +7% synergy
Land Tax
10% of 4093 decks +4% synergy
Revel in Riches
10% of 3008 decks +7% synergy
Leyline of the Guildpact
10% of 107 decks -13% synergy
Sylvan Library
10% of 891 decks -1% synergy
Court of Grace
10% of 3944 decks +7% synergy
Mirari's Wake
10% of 891 decks -4% synergy
Ghostly Prison
10% of 4093 decks -2% synergy
Moldervine Reclamation
10% of 683 decks +1% synergy
Dark Prophecy
9% of 3008 decks +8% synergy
Ajani's Welcome
9% of 4081 decks +8% synergy
Divine Visitation
9% of 4077 decks +7% synergy
Case of the Uneaten Feast
9% of 1363 decks +8% synergy
Parallel Lives
9% of 891 decks +2% synergy
Aura Shards
9% of 891 decks +0% synergy
Doubling Season
9% of 891 decks -0% synergy
Sigarda's Splendor
9% of 3833 decks +8% synergy
Rising of the Day
9% of 435 decks +3% synergy
Phyrexian Reclamation
9% of 3008 decks +5% synergy
Trouble in Pairs
8% of 1320 decks +2% synergy
Dazzling Theater // Prop Room
8% of 254 decks -8% synergy
Tocasia's Welcome
8% of 3380 decks +4% synergy
Rhythm of the Wild
8% of 331 decks -15% synergy
Trudge Garden
8% of 862 decks +7% synergy
Planeswalkers
Rowan Kenrith
17% of 655 decks +17% synergy
Will Kenrith
16% of 679 decks +16% synergy
Ajani, Strength of the Pride
12% of 4028 decks +11% synergy
Liliana, Dreadhorde General
11% of 2957 decks +8% synergy
Elspeth, Sun's Champion
11% of 4093 decks +6% synergy
Dihada, Binder of Wills
10% of 503 decks +5% synergy
Sorin, Vengeful Bloodlord
8% of 2957 decks +6% synergy
Kaya, Geist Hunter
5% of 2754 decks +4% synergy
Tevesh Szat, Doom of Fools
5% of 2873 decks +4% synergy
Utility Lands
Bojuka Bog
35% of 3008 decks +5% synergy
Vault of the Archangel
27% of 3008 decks +16% synergy
Reliquary Tower
24% of 4093 decks -6% synergy
Westvale Abbey
18% of 3008 decks +16% synergy
High Market
15% of 4093 decks +12% synergy
Phyrexian Tower
15% of 3008 decks +6% synergy
Castle Ardenvale
14% of 4018 decks +9% synergy
Urborg, Tomb of Yawgmoth
14% of 4093 decks +4% synergy
Radiant Fountain
12% of 4093 decks +11% synergy
Minas Tirith
12% of 2587 decks +3% synergy
War Room
12% of 3944 decks +5% synergy
Boseiju, Who Endures
11% of 844 decks -8% synergy
Emeria, the Sky Ruin
11% of 4093 decks +8% synergy
Rogue's Passage
11% of 4093 decks -9% synergy
Seraph Sanctuary
10% of 4093 decks +9% synergy
Eiganjo, Seat of the Empire
10% of 3764 decks +1% synergy
Castle Locthwain
10% of 2935 decks +5% synergy
Cabal Coffers
10% of 3008 decks -1% synergy
Takenuma, Abandoned Mire
9% of 2721 decks -1% synergy
Gavony Township
9% of 891 decks -0% synergy
The Shire
9% of 635 decks +5% synergy
Temple of the False God
9% of 4093 decks -1% synergy
Otawara, Soaring City
9% of 641 decks -8% synergy
Shambling Vent
8% of 3008 decks +7% synergy
Fountainport
8% of 548 decks +5% synergy
Nykthos, Shrine to Nyx
8% of 4093 decks +2% synergy
Kabira Crossroads
8% of 4093 decks +7% synergy
Secluded Steppe
8% of 4093 decks +5% synergy
Spymaster's Vault
7% of 700 decks +3% synergy
Monumental Henge
7% of 912 decks +3% synergy
Windbrisk Heights
7% of 4093 decks +2% synergy
Arena of Glory
7% of 148 decks -2% synergy
Restless Fortress
7% of 1503 decks +3% synergy
Ghost Quarter
6% of 4093 decks +4% synergy
Mortuary Mire
6% of 3008 decks +1% synergy
Ancient Tomb
6% of 4093 decks -5% synergy
Scavenger Grounds
5% of 4093 decks +2% synergy
Hall of Heliod's Generosity
5% of 4032 decks -2% synergy
Barren Moor
5% of 3008 decks +1% synergy
Mana Artifacts
Sol Ring
81% of 4093 decks -4% synergy
Arcane Signet
69% of 4018 decks -3% synergy
Orzhov Signet
55% of 3008 decks +28% synergy
Talisman of Hierarchy
40% of 2949 decks +15% synergy
Rakdos Signet
27% of 577 decks -2% synergy
Boros Signet
26% of 655 decks +3% synergy
Mind Stone
25% of 4093 decks +8% synergy
Azorius Signet
23% of 679 decks -2% synergy
Dimir Signet
19% of 536 decks -11% synergy
Pristine Talisman
18% of 4093 decks +17% synergy
Fellwar Stone
17% of 4093 decks -4% synergy
Talisman of Conviction
17% of 643 decks -6% synergy
Talisman of Progress
17% of 679 decks -6% synergy
Commander's Sphere
16% of 4093 decks +1% synergy
Talisman of Indulgence
14% of 577 decks -12% synergy
Thought Vessel
14% of 4093 decks -3% synergy
Talisman of Dominance
14% of 536 decks -18% synergy
Marble Diamond
12% of 4093 decks +8% synergy
Selesnya Signet
10% of 891 decks +2% synergy
Timeless Lotus
10% of 263 decks -4% synergy
Golgari Signet
8% of 695 decks -4% synergy
Chromatic Lantern
8% of 4093 decks -2% synergy
Charcoal Diamond
7% of 3008 decks +2% synergy
Talisman of Unity
7% of 891 decks -0% synergy
Orzhov Locket
6% of 2991 decks +6% synergy
Relic of Legends
6% of 3607 decks +4% synergy
Talisman of Resilience
6% of 684 decks -6% synergy
Izzet Signet
6% of 314 decks -22% synergy
Simic Signet
6% of 362 decks -9% synergy
Gruul Signet
5% of 335 decks -6% synergy
Talisman of Curiosity
5% of 355 decks -7% synergy
Lands
Command Tower
69% of 4093 decks -5% synergy
Isolated Chapel
50% of 3008 decks +22% synergy
Godless Shrine
47% of 3008 decks +7% synergy
Caves of Koilos
47% of 3008 decks +19% synergy
Temple Garden
40% of 891 decks -0% synergy
Overgrown Tomb
39% of 695 decks -3% synergy
Orzhov Basilica
38% of 3008 decks +22% synergy
Indatha Triome
38% of 683 decks +7% synergy
Nomad Outpost
37% of 577 decks +9% synergy
Hallowed Fountain
35% of 679 decks -5% synergy
Temple of Silence
35% of 3008 decks +17% synergy
The World Tree
35% of 277 decks +2% synergy
Sandsteppe Citadel
35% of 695 decks +9% synergy
Tainted Field
33% of 3008 decks +20% synergy
Vault of Champions
33% of 2873 decks +7% synergy
Breeding Pool
32% of 362 decks -9% synergy
Sacred Foundry
32% of 655 decks -4% synergy
Spara's Headquarters
32% of 342 decks -0% synergy
Blood Crypt
31% of 577 decks -7% synergy
Arcane Sanctum
31% of 536 decks +4% synergy
Watery Grave
31% of 536 decks -10% synergy
Stomping Ground
31% of 335 decks -10% synergy
Savai Triome
31% of 563 decks +4% synergy
Ketria Triome
30% of 292 decks -2% synergy
Jetmir's Garden
30% of 316 decks -2% synergy
Raffine's Tower
30% of 501 decks +3% synergy
Canopy Vista
30% of 891 decks -6% synergy
Scoured Barrens
28% of 3008 decks +19% synergy
Bountiful Promenade
28% of 891 decks +4% synergy
Zagoth Triome
26% of 303 decks -4% synergy
Steam Vents
26% of 314 decks -13% synergy
Sunpetal Grove
26% of 891 decks +2% synergy
Fetid Heath
25% of 3008 decks +14% synergy
Prairie Stream
25% of 679 decks -9% synergy
Sea of Clouds
24% of 679 decks -2% synergy
Exotic Orchard
24% of 4093 decks -11% synergy
Myriad Landscape
24% of 4093 decks +5% synergy
Raugrin Triome
24% of 308 decks -2% synergy
Woodland Cemetery
24% of 695 decks -4% synergy
Ziatora's Proving Ground
24% of 285 decks -8% synergy
Undergrowth Stadium
23% of 679 decks -3% synergy
Shattered Sanctum
23% of 2754 decks +10% synergy
Shineshadow Snarl
23% of 2825 decks +11% synergy
Clifftop Retreat
22% of 655 decks -7% synergy
Dragonskull Summit
22% of 577 decks -9% synergy
Evolving Wilds
22% of 4093 decks +1% synergy
Brightclimb Pathway
21% of 2883 decks +11% synergy
Seaside Citadel
21% of 362 decks -5% synergy
Shattered Landscape
21% of 126 decks +8% synergy
Jungle Shrine
21% of 335 decks -12% synergy