Swan Song (Card)
Swan Song
In 463529 decks
16% of 2816853 decks
Apr 1, 2025
Jeskai Striker Precon Guide - Tarkir: Dragonstorm
Jeskai Strike-r your way to victory with this mystical Tarkir: Dragonstorm precon.
Dec 21, 2024
Pol Jamaar, Illusionist Commander Deck Tech
Draw cards and morph into any creature type with this Pol Jamaar, Illusionist Commander deck tech.
New Commanders
Hashaton, Scarab's Fist
36.86% of 11822 decks
4358 decks
Top Commanders
Kinnan, Bonder Prodigy
63.35% of 13824 decks
8758 decks
Urza, Lord High Artificer
48.30% of 14165 decks
6841 decks
Kraum, Ludevic's Opus // Tymna the Weaver
89.57% of 7223 decks
6470 decks
Thrasios, Triton Hero // Tymna the Weaver
83.19% of 7174 decks
5968 decks
Tivit, Seller of Secrets
44.37% of 12267 decks
5443 decks
Kenrith, the Returned King
22.39% of 23873 decks
5344 decks
Yuriko, the Tiger's Shadow
20.67% of 25684 decks
5308 decks
Sisay, Weatherlight Captain
38.80% of 13195 decks
5120 decks
Sauron, the Dark Lord
18.97% of 26631 decks
5051 decks
Najeela, the Blade-Blossom
44.35% of 11372 decks
5043 decks
Lord of the Nazgûl
39.96% of 12561 decks
5019 decks
Niv-Mizzet, Parun
31.71% of 15633 decks
4958 decks
Atraxa, Grand Unifier
32.97% of 14617 decks
4819 decks
Talion, the Kindly Lord
57.82% of 8084 decks
4674 decks
Shorikai, Genesis Engine
22.16% of 18700 decks
4143 decks
Nekusar, the Mindrazer
19.11% of 21039 decks
4021 decks
Stella Lee, Wild Card
35.28% of 11033 decks
3892 decks
New Cards
Voice of Victory
14% of 22170 decks
+10% synergy
Mistrise Village
11% of 49658 decks
+6% synergy
Riverpyre Verge
9% of 47401 decks
+3% synergy
Nature's Rhythm
9% of 18060 decks
+6% synergy
Willowrush Verge
8% of 48252 decks
+2% synergy
High Synergy Cards
Birds of Paradise
67% of 183975 decks
+39% synergy
Esper Sentinel
58% of 185366 decks
+39% synergy
Mystic Remora
54% of 463529 decks
+37% synergy
Noble Hierarch
52% of 80206 decks
+36% synergy
Deflecting Swat
52% of 192609 decks
+36% synergy
An Offer You Can't Refuse
56% of 463529 decks
+35% synergy
Silence
40% of 185366 decks
+34% synergy
Boseiju, Who Endures
53% of 183975 decks
+34% synergy
Deathrite Shaman
45% of 79875 decks
+34% synergy
Demonic Consultation
36% of 223945 decks
+32% synergy
Top Cards
Swords to Plowshares
78% of 185366 decks
+15% synergy
Smothering Tithe
52% of 185366 decks
+28% synergy
Dark Ritual
47% of 223945 decks
+25% synergy
Ignoble Hierarch
47% of 39100 decks
+22% synergy
Worldly Tutor
45% of 183975 decks
+31% synergy
Path to Exile
45% of 185366 decks
-2% synergy
Counterspell
44% of 463529 decks
+2% synergy
Lotho, Corrupt Shirriff
42% of 99456 decks
+30% synergy
Mana Drain
40% of 463529 decks
+25% synergy
Orcish Bowmasters
40% of 215518 decks
+31% synergy
Game Changers
Rhystic Study
65% of 463529 decks
+39% synergy
Cyclonic Rift
62% of 463529 decks
+36% synergy
Demonic Tutor
62% of 223945 decks
+41% synergy
Vampiric Tutor
59% of 223945 decks
+41% synergy
Enlightened Tutor
55% of 185366 decks
+38% synergy
Fierce Guardianship
55% of 463529 decks
+37% synergy
Force of Will
44% of 463529 decks
+33% synergy
Mystical Tutor
43% of 463529 decks
+29% synergy
Ancient Tomb
38% of 463529 decks
+28% synergy
Chrome Mox
36% of 463529 decks
+30% synergy
Creatures
Delighted Halfling
37% of 180358 decks
+25% synergy
Grand Abolisher
37% of 185366 decks
+28% synergy
Opposition Agent
33% of 223945 decks
+26% synergy
Dockside Extortionist
31% of 192609 decks
+22% synergy
Ragavan, Nimble Pilferer
31% of 192609 decks
+23% synergy
Drannith Magistrate
30% of 185366 decks
+24% synergy
Bloom Tender
30% of 183975 decks
+22% synergy
Ranger-Captain of Eos
29% of 185366 decks
+25% synergy
Eternal Witness
28% of 183975 decks
+8% synergy
Thassa's Oracle
26% of 463529 decks
+19% synergy
Llanowar Elves
25% of 183975 decks
+4% synergy
Elvish Mystic
25% of 183975 decks
+8% synergy
Seedborn Muse
25% of 183975 decks
+17% synergy
Faeburrow Elder
24% of 80206 decks
+13% synergy
Simian Spirit Guide
24% of 192609 decks
+19% synergy
Dauthi Voidwalker
23% of 223945 decks
+15% synergy
Kutzil, Malamet Exemplar
22% of 66222 decks
+8% synergy
Elvish Spirit Guide
20% of 183975 decks
+17% synergy
Phyrexian Metamorph
19% of 463529 decks
+12% synergy
Elves of Deep Shadow
19% of 79875 decks
+8% synergy
Archivist of Oghma
18% of 185366 decks
+13% synergy
Fyndhorn Elves
18% of 183975 decks
+6% synergy
Avacyn's Pilgrim
18% of 80206 decks
+4% synergy
Emiel the Blessed
18% of 80206 decks
+15% synergy
Kinnan, Bonder Prodigy
17% of 183975 decks
+13% synergy
Derevi, Empyrial Tactician
17% of 80206 decks
+13% synergy
Faerie Mastermind
16% of 463529 decks
+10% synergy
Talion, the Kindly Lord
15% of 202094 decks
+11% synergy
Imperial Recruiter
15% of 192609 decks
+10% synergy
Storm-Kiln Artist
15% of 192609 decks
+6% synergy
Birgi, God of Storytelling
15% of 192609 decks
+9% synergy
Hullbreaker Horror
15% of 463529 decks
+7% synergy
Tinder Wall
14% of 73837 decks
+12% synergy
Notion Thief
14% of 223945 decks
+7% synergy
Displacer Kitten
13% of 463529 decks
+8% synergy
Enduring Vitality
13% of 85801 decks
+7% synergy
Spellseeker
13% of 463529 decks
+10% synergy
Pollywog Prodigy
13% of 250564 decks
+8% synergy
Phantasmal Image
11% of 463529 decks
+8% synergy
Consecrated Sphinx
11% of 463529 decks
+6% synergy
Valley Floodcaller
11% of 254103 decks
+8% synergy
Baleful Strix
11% of 223945 decks
-2% synergy
Morophon, the Boundless
11% of 35783 decks
-3% synergy
Endurance
11% of 183975 decks
+8% synergy
Mockingbird
10% of 252642 decks
+7% synergy
Sheoldred, the Apocalypse
10% of 223945 decks
+5% synergy
Archmage Emeritus
10% of 463529 decks
+2% synergy
Esika, God of the Tree
9% of 35783 decks
+2% synergy
Tatyova, Benthic Druid
9% of 183975 decks
-3% synergy
Dualcaster Mage
9% of 192609 decks
+5% synergy
Instants
Abrupt Decay
38% of 79875 decks
+27% synergy
Assassin's Trophy
37% of 79875 decks
+7% synergy
Force of Negation
37% of 463529 decks
+28% synergy
Tainted Pact
35% of 223945 decks
+31% synergy
Flusterstorm
35% of 463529 decks
+28% synergy
Pact of Negation
33% of 463529 decks
+26% synergy
Heroic Intervention
33% of 183975 decks
+3% synergy
Mental Misstep
30% of 463529 decks
+24% synergy
Deadly Rollick
30% of 223945 decks
+19% synergy
Eladamri's Call
30% of 80206 decks
+20% synergy
Beast Within
30% of 183975 decks
-7% synergy
Dovin's Veto
29% of 185366 decks
+11% synergy
Brainstorm
28% of 463529 decks
+8% synergy
Arcane Denial
27% of 463529 decks
+7% synergy
Veil of Summer
27% of 183975 decks
+21% synergy
Teferi's Protection
26% of 185366 decks
+7% synergy
Mindbreak Trap
23% of 463529 decks
+19% synergy
Crop Rotation
23% of 183975 decks
+13% synergy
Chaos Warp
22% of 192609 decks
-9% synergy
Red Elemental Blast
22% of 192609 decks
+15% synergy
Noxious Revival
22% of 183975 decks
+16% synergy
Pongify
21% of 463529 decks
+10% synergy
Sink into Stupor
21% of 284601 decks
+11% synergy
Negate
21% of 463529 decks
-2% synergy
Chord of Calling
20% of 183975 decks
+15% synergy
Pyroblast
20% of 192609 decks
+14% synergy
Chain of Vapor
19% of 463529 decks
+15% synergy
Cabal Ritual
18% of 223945 decks
+13% synergy
Lightning Bolt
17% of 192609 decks
+7% synergy
Ad Nauseam
16% of 223945 decks
+14% synergy
Generous Gift
16% of 185366 decks
-9% synergy
Rapid Hybridization
16% of 463529 decks
+7% synergy
Growth Spiral
16% of 183975 decks
-6% synergy
Snap
15% of 463529 decks
+8% synergy
Strix Serenade
15% of 284601 decks
+11% synergy
Anguished Unmaking
15% of 103561 decks
-9% synergy
Frantic Search
15% of 463529 decks
+2% synergy
Muddle the Mixture
15% of 463529 decks
+10% synergy
Entomb
13% of 223945 decks
+6% synergy
Final Fortune
13% of 192609 decks
+11% synergy
Dispel
13% of 463529 decks
+9% synergy
Brain Freeze
13% of 463529 decks
+10% synergy
Nature's Claim
12% of 183975 decks
+4% synergy
Borne Upon a Wind
12% of 446014 decks
+9% synergy
Culling the Weak
11% of 223945 decks
+8% synergy
Dramatic Reversal
11% of 463529 decks
+6% synergy
Opt
11% of 463529 decks
+1% synergy
Void Rend
11% of 103561 decks
-3% synergy
Into the Flood Maw
10% of 254103 decks
+7% synergy
Lim-Dûl's Vault
10% of 223945 decks
+7% synergy
Sorceries
Toxic Deluge
38% of 223945 decks
+20% synergy
Jeska's Will
36% of 192609 decks
+20% synergy
Gamble
35% of 192609 decks
+25% synergy
Imperial Seal
33% of 223945 decks
+27% synergy
Finale of Devastation
32% of 183975 decks
+24% synergy
Nature's Lore
31% of 183975 decks
-1% synergy
Farseek
29% of 183975 decks
-5% synergy
Culling Ritual
29% of 79875 decks
+18% synergy
Three Visits
28% of 183975 decks
+4% synergy
Reanimate
28% of 223945 decks
+11% synergy
Blasphemous Act
27% of 192609 decks
-6% synergy
Cultivate
25% of 183975 decks
-20% synergy
Windfall
24% of 463529 decks
+12% synergy
Eldritch Evolution
24% of 183975 decks
+19% synergy
Wheel of Fortune
22% of 192609 decks
+18% synergy
Sevinne's Reclamation
22% of 185366 decks
+15% synergy
Diabolic Intent
21% of 223945 decks
+13% synergy
Neoform
19% of 183975 decks
+14% synergy
Rampant Growth
19% of 183975 decks
-15% synergy
Ponder
19% of 463529 decks
+6% synergy
Rite of Flame
18% of 192609 decks
+15% synergy
Kodama's Reach
17% of 183975 decks
-14% synergy
Supreme Verdict
16% of 185366 decks
+2% synergy
Mnemonic Betrayal
16% of 223945 decks
+12% synergy
Gitaxian Probe
16% of 463529 decks
+10% synergy
Faithless Looting
15% of 192609 decks
-1% synergy
Vandalblast
15% of 192609 decks
-0% synergy
Preordain
15% of 463529 decks
+4% synergy
Green Sun's Zenith
14% of 183975 decks
+9% synergy
Farewell
14% of 185366 decks
+1% synergy
Feed the Swarm
13% of 223945 decks
-4% synergy
Damn
13% of 103561 decks
-3% synergy
Beseech the Mirror
12% of 200419 decks
+8% synergy
Praetor's Grasp
11% of 223945 decks
+8% synergy
Fabricate
11% of 463529 decks
+5% synergy
Sea Gate Restoration
9% of 463529 decks
+5% synergy
Damnation
9% of 223945 decks
+2% synergy
Bala Ged Recovery
8% of 183975 decks
-1% synergy
Grapeshot
8% of 192609 decks
+4% synergy
Skyshroud Claim
8% of 183975 decks
-1% synergy
Solve the Equation
8% of 463529 decks
+4% synergy
Grim Tutor
7% of 223945 decks
+3% synergy
Wargate
7% of 80206 decks
+4% synergy
Yawgmoth's Will
7% of 223945 decks
+5% synergy
Expressive Iteration
7% of 192609 decks
+0% synergy
Twinflame
6% of 192609 decks
+3% synergy
Approach of the Second Sun
6% of 185366 decks
+3% synergy
Mana Geyser
6% of 192609 decks
-1% synergy
Explore
6% of 183975 decks
-4% synergy
Timetwister
6% of 463529 decks
+4% synergy
Utility Artifacts
Lotus Petal
36% of 463529 decks
+29% synergy
The One Ring
32% of 463529 decks
+24% synergy
Wishclaw Talisman
28% of 223945 decks
+23% synergy
Lightning Greaves
27% of 463529 decks
+2% synergy
Swiftfoot Boots
17% of 463529 decks
-10% synergy
Jeweled Lotus
17% of 463529 decks
+13% synergy
Sensei's Divining Top
15% of 463529 decks
+9% synergy
Mind Stone
12% of 463529 decks
-5% synergy
Lion's Eye Diamond
12% of 463529 decks
+10% synergy
Isochron Scepter
11% of 463529 decks
+9% synergy
The Great Henge
9% of 183975 decks
-1% synergy
Sapphire Medallion
8% of 463529 decks
+6% synergy
Skullclamp
7% of 463529 decks
-5% synergy
Commander's Sphere
7% of 463529 decks
-8% synergy
Bolas's Citadel
7% of 223945 decks
-2% synergy
Birthing Pod
6% of 183975 decks
+3% synergy
Wayfarer's Bauble
5% of 463529 decks
-4% synergy
Grafdigger's Cage
5% of 463529 decks
+4% synergy
Enchantments
Underworld Breach
34% of 192609 decks
+28% synergy
Sylvan Library
26% of 183975 decks
+15% synergy
Carpet of Flowers
17% of 183975 decks
+13% synergy
Necropotence
16% of 223945 decks
+11% synergy
Blind Obedience
14% of 185366 decks
+8% synergy
Animate Dead
13% of 223945 decks
+4% synergy
Temur Ascendancy
12% of 73837 decks
-3% synergy
Wild Growth
12% of 183975 decks
+1% synergy
Ghostly Prison
12% of 185366 decks
+1% synergy
Rhythm of the Wild
12% of 73837 decks
-12% synergy
Exploration
12% of 183975 decks
+4% synergy
Propaganda
11% of 463529 decks
-1% synergy
Black Market Connections
11% of 223945 decks
+0% synergy
Trouble in Pairs
9% of 139528 decks
+4% synergy
Leyline of the Guildpact
9% of 26485 decks
-7% synergy
Whirlwind of Thought
9% of 76444 decks
-1% synergy
Utopia Sprawl
8% of 183975 decks
+1% synergy
Call the Spirit Dragons
8% of 3589 decks
-3% synergy
Phyrexian Arena
8% of 223945 decks
-8% synergy
Touch the Spirit Realm
7% of 185366 decks
+5% synergy
Hardened Scales
6% of 183975 decks
-3% synergy
Garruk's Uprising
6% of 183975 decks
-10% synergy
Doubling Season
6% of 183975 decks
-3% synergy
Bloodchief Ascension
6% of 223945 decks
+3% synergy
Food Chain
6% of 183975 decks
+5% synergy
Necromancy
6% of 223945 decks
+3% synergy
Kindred Discovery
6% of 463529 decks
-1% synergy
Jeskai Ascendancy
6% of 76444 decks
+0% synergy
Annie Joins Up
6% of 28387 decks
-6% synergy
Survival of the Fittest
6% of 183975 decks
+4% synergy
Mirari's Wake
6% of 80206 decks
-7% synergy
Dress Down
6% of 463529 decks
+4% synergy
Impact Tremors
6% of 192609 decks
-4% synergy
Aura Shards
6% of 80206 decks
-3% synergy
Burgeoning
6% of 183975 decks
+2% synergy
Guardian Project
5% of 183975 decks
-3% synergy
Anointed Procession
5% of 185366 decks
-3% synergy
Teferi's Ageless Insight
5% of 463529 decks
+0% synergy
Counterbalance
5% of 463529 decks
+4% synergy
Land Tax
5% of 185366 decks
-2% synergy
Battles
Invasion of Ikoria
12% of 183975 decks
+8% synergy
Planeswalkers
Teferi, Time Raveler
22% of 185366 decks
+16% synergy
Oko, Thief of Crowns
10% of 183975 decks
+5% synergy
Narset, Parter of Veils
9% of 463529 decks
+5% synergy
Tyvar, Jubilant Brawler
9% of 79875 decks
+5% synergy
Dihada, Binder of Wills
8% of 46543 decks
+4% synergy
Tezzeret the Seeker
7% of 463529 decks
+4% synergy
Nicol Bolas, Dragon-God
6% of 92396 decks
+2% synergy
Aminatou, the Fateshifter
5% of 103561 decks
+2% synergy
Jace, Wielder of Mysteries
5% of 463529 decks
+2% synergy
Utility Lands
Otawara, Soaring City
47% of 463529 decks
+30% synergy
Reliquary Tower
33% of 463529 decks
+4% synergy
Gaea's Cradle
24% of 183975 decks
+19% synergy
Urza's Saga
20% of 463529 decks
+13% synergy
Bojuka Bog
19% of 223945 decks
-11% synergy
Mystic Sanctuary
16% of 463529 decks
+5% synergy
Shifting Woodland
14% of 115133 decks
+8% synergy
Minamo, School at Water's Edge
14% of 463529 decks
+9% synergy
Takenuma, Abandoned Mire
12% of 223945 decks
+2% synergy
Urborg, Tomb of Yawgmoth
11% of 463529 decks
+1% synergy
Yavimaya, Cradle of Growth
10% of 463529 decks
+1% synergy
Cephalid Coliseum
9% of 463529 decks
+6% synergy
Eiganjo, Seat of the Empire
9% of 185366 decks
+1% synergy
Rogue's Passage
9% of 463529 decks
-11% synergy
Phyrexian Tower
8% of 223945 decks
-1% synergy
Alchemist's Refuge
8% of 183975 decks
+1% synergy
Emergence Zone
7% of 463529 decks
+5% synergy
Cabal Coffers
7% of 223945 decks
-3% synergy
Academy Ruins
7% of 463529 decks
+2% synergy
Seat of the Synod
6% of 463529 decks
+0% synergy
Hall of Heliod's Generosity
6% of 185366 decks
-0% synergy
Inventors' Fair
6% of 463529 decks
+3% synergy
Ancient Den
5% of 185366 decks
+0% synergy
Arena of Glory
5% of 114916 decks
-1% synergy
Dryad Arbor
5% of 183975 decks
+1% synergy
Shizo, Death's Storehouse
5% of 223945 decks
+1% synergy
Mana Artifacts
Sol Ring
93% of 463529 decks
+9% synergy
Arcane Signet
84% of 463529 decks
+11% synergy
Talisman of Dominance
50% of 223945 decks
+18% synergy
Talisman of Creativity
43% of 192609 decks
+14% synergy
Fellwar Stone
42% of 463529 decks
+21% synergy
Talisman of Progress
38% of 185366 decks
+14% synergy
Mana Vault
32% of 463529 decks
+26% synergy
Talisman of Indulgence
29% of 92396 decks
+2% synergy
Mox Diamond
27% of 463529 decks
+23% synergy
Izzet Signet
26% of 192609 decks
-1% synergy
Dimir Signet
26% of 223945 decks
-2% synergy
Mana Crypt
24% of 463529 decks
+18% synergy
Mox Opal
24% of 463529 decks
+20% synergy
Thought Vessel
22% of 463529 decks
+5% synergy
Talisman of Hierarchy
22% of 103561 decks
-4% synergy
Azorius Signet
22% of 185366 decks
-3% synergy
Talisman of Curiosity
21% of 183975 decks
+8% synergy
Mox Amber
20% of 463529 decks
+16% synergy
Talisman of Conviction
18% of 76444 decks
-6% synergy
Rakdos Signet
14% of 92396 decks
-15% synergy
Simic Signet
13% of 183975 decks
-1% synergy
Grim Monolith
12% of 463529 decks
+10% synergy
Orzhov Signet
11% of 103561 decks
-16% synergy
Basalt Monolith
9% of 463529 decks
+7% synergy
Boros Signet
9% of 76444 decks
-13% synergy
Relic of Sauron
9% of 88170 decks
+0% synergy
Talisman of Resilience
8% of 79875 decks
-5% synergy
Chromatic Lantern
8% of 463529 decks
-2% synergy
Talisman of Impulse
8% of 73837 decks
-2% synergy
Timeless Lotus
7% of 35783 decks
-5% synergy
Springleaf Drum
6% of 463529 decks
+4% synergy
Lands
Command Tower
86% of 463529 decks
+12% synergy
Watery Grave
75% of 223945 decks
+35% synergy
Breeding Pool
72% of 183975 decks
+32% synergy
Hallowed Fountain
71% of 185366 decks
+31% synergy
Steam Vents
70% of 192609 decks
+31% synergy
Overgrown Tomb
61% of 79875 decks
+19% synergy
Stomping Ground
58% of 73837 decks
+17% synergy
Godless Shrine
57% of 103561 decks
+17% synergy
Blood Crypt
57% of 92396 decks
+18% synergy
Temple Garden
55% of 80206 decks
+15% synergy
Morphic Pool
52% of 223945 decks
+26% synergy
Rejuvenating Springs
50% of 183975 decks
+22% synergy
Polluted Delta
50% of 463529 decks
+39% synergy
Scrubland
49% of 103561 decks
+35% synergy
Bayou
49% of 79875 decks
+35% synergy
Misty Rainforest
48% of 463529 decks
+37% synergy
Flooded Strand
48% of 463529 decks
+37% synergy
Training Center
48% of 192609 decks
+21% synergy
Scalding Tarn
48% of 463529 decks
+37% synergy
Exotic Orchard
47% of 463529 decks
+11% synergy
Sacred Foundry
46% of 76444 decks
+11% synergy
Sea of Clouds
45% of 185366 decks
+19% synergy
Taiga
45% of 73837 decks
+32% synergy
Underground Sea
44% of 223945 decks
+30% synergy
Badlands
44% of 92396 decks
+31% synergy
Savannah
44% of 80206 decks
+31% synergy
Tundra
43% of 185366 decks
+29% synergy
Tropical Island
43% of 183975 decks
+29% synergy
Volcanic Island
42% of 192609 decks
+29% synergy
Plateau
42% of 76444 decks
+30% synergy
City of Brass
36% of 463529 decks
+28% synergy
Mana Confluence
34% of 463529 decks
+27% synergy
Verdant Catacombs
31% of 463529 decks
+20% synergy
Luxury Suite
31% of 92396 decks
+5% synergy
Shivan Reef
31% of 192609 decks
+3% synergy
Ketria Triome
31% of 73837 decks
-1% synergy
Marsh Flats
31% of 463529 decks
+20% synergy
Bloodstained Mire
30% of 463529 decks
+20% synergy
Sulfur Falls
30% of 192609 decks
-2% synergy
Yavimaya Coast
29% of 183975 decks
+2% synergy
Underground River
29% of 223945 decks
+9% synergy
Gemstone Caverns
29% of 463529 decks
+24% synergy
Vault of Champions
29% of 103561 decks
+3% synergy
Hinterland Harbor
28% of 183975 decks
-1% synergy
Windswept Heath
28% of 463529 decks
+17% synergy
Spara's Headquarters
28% of 80206 decks
-2% synergy
Xander's Lounge
27% of 92396 decks
+1% synergy
Zagoth Triome
27% of 79875 decks
-3% synergy
Drowned Catacomb
27% of 223945 decks
-0% synergy
Wooded Foothills
27% of 463529 decks
+16% synergy