Eternal of Harsh Truths (Card)
Eternal of Harsh Truths
In 2413 decks
0% of 2787791 decks
Temmet, Naktamun's Will
1.02% of 6193 decks
63 decks
Top Commanders
Tetsuko Umezawa, Fugitive
53.83% of 1698 decks
914 decks
Nicol Bolas, the Ravager
2.62% of 7508 decks
197 decks
The Scarab God
1.37% of 11183 decks
153 decks
Wilhelt, the Rotcleaver
0.58% of 19535 decks
113 decks
Geralf, the Fleshwright
5.19% of 1638 decks
85 decks
Varina, Lich Queen
0.65% of 8562 decks
56 decks
Vorthos, Steward of Myth
19.01% of 263 decks
50 decks
Jace, Vryn's Prodigy
3.67% of 1252 decks
46 decks
Gisa and Geralf
0.85% of 5281 decks
45 decks
Geralf, Visionary Stitcher
2.73% of 1173 decks
32 decks
Jason Bright, Glowing Prophet
34.07% of 91 decks
31 decks
Niko, Light of Hope
0.69% of 4201 decks
29 decks
Temmet, Vizier of Naktamun
4.45% of 539 decks
24 decks
Nekusar, the Mindrazer
0.10% of 20922 decks
20 decks
Nicol Bolas
1.95% of 1027 decks
20 decks
The Locust God
0.30% of 5952 decks
18 decks
Volo, Guide to Monsters
0.21% of 7914 decks
17 decks
New Cards
On Wings of Gold
48% of 142 decks
+46% synergy
Hashaton, Scarab's Fist
37% of 108 decks
+33% synergy
Wizened Mentor
34% of 142 decks
+33% synergy
Lost Monarch of Ifnir
32% of 262 decks
+30% synergy
Renewed Solidarity
29% of 142 decks
+26% synergy
High Synergy Cards
Conflux
70% of 67 decks
+66% synergy
Nicol Bolas, God-Pharaoh
70% of 374 decks
+66% synergy
Nicol Bolas, Dragon-God
68% of 374 decks
+64% synergy
Nicol Bolas, the Deceiver
61% of 374 decks
+60% synergy
Palladia-Mors, the Ruiner
59% of 69 decks
+59% synergy
Nicol Bolas, Planeswalker
60% of 374 decks
+58% synergy
Cruel Ultimatum
59% of 374 decks
+56% synergy
Neheb, the Eternal
58% of 470 decks
+55% synergy
Wildfire Eternal
49% of 470 decks
+49% synergy
Hour of Devastation
49% of 470 decks
+49% synergy
Top Cards
Counterspell
49% of 2413 decks
+7% synergy
Jodah, Archmage Eternal
49% of 67 decks
+45% synergy
Fist of Suns
49% of 67 decks
+42% synergy
Gleaming Overseer
48% of 972 decks
+45% synergy
Wayward Servant
47% of 230 decks
+46% synergy
Slave of Bolas
47% of 374 decks
+46% synergy
Domri, Anarch of Bolas
47% of 81 decks
+44% synergy
Lord of the Accursed
45% of 972 decks
+43% synergy
Dark Intimations
44% of 374 decks
+43% synergy
Niv-Mizzet Reborn
43% of 67 decks
+41% synergy
Game Changers
Bolas's Citadel
26% of 972 decks
+17% synergy
Cyclonic Rift
16% of 2413 decks
-10% synergy
Rhystic Study
13% of 2413 decks
-14% synergy
Fierce Guardianship
7% of 2413 decks
-11% synergy
Smothering Tithe
7% of 364 decks
-17% synergy
Demonic Tutor
6% of 972 decks
-15% synergy
Mystical Tutor
6% of 2413 decks
-8% synergy
Creatures
Diregraf Captain
42% of 972 decks
+38% synergy
Dreadhorde Twins
42% of 470 decks
+42% synergy
God-Eternal Oketra
40% of 364 decks
+38% synergy
Death Baron
39% of 972 decks
+36% synergy
Nicol Bolas
38% of 374 decks
+37% synergy
Dreadhorde Butcher
37% of 374 decks
+37% synergy
Corpse Knight
37% of 230 decks
+31% synergy
Grim Initiate
36% of 470 decks
+35% synergy
Scroll Thief
34% of 2413 decks
+34% synergy
Vizier of the Scorpion
34% of 972 decks
+33% synergy
Neurok Commando
33% of 2413 decks
+33% synergy
Tandem Lookout
32% of 2413 decks
+30% synergy
Neheb, Dreadhorde Champion
31% of 470 decks
+30% synergy
Library Larcenist
31% of 2413 decks
+31% synergy
Mischievous Catgeist
31% of 2413 decks
+31% synergy
Diregraf Colossus
30% of 972 decks
+28% synergy
Cemetery Reaper
30% of 972 decks
+28% synergy
The Scarab God
29% of 972 decks
+26% synergy
Binding Mummy
29% of 364 decks
+29% synergy
The Locust God
29% of 470 decks
+24% synergy
Priest of the Crossing
27% of 142 decks
+27% synergy
Undead Augur
27% of 972 decks
+25% synergy
Mistblade Shinobi
26% of 2413 decks
+25% synergy
Champion of the Perished
26% of 972 decks
+24% synergy
Gravecrawler
25% of 972 decks
+22% synergy
Mist-Syndicate Naga
25% of 2413 decks
+24% synergy
The Scorpion God
24% of 374 decks
+24% synergy
Manticore Eternal
24% of 470 decks
+24% synergy
Eternal Skylord
24% of 2413 decks
+23% synergy
Zul Ashur, Lich Lord
23% of 383 decks
+22% synergy
God-Eternal Bontu
23% of 972 decks
+22% synergy
Gray Merchant of Asphodel
22% of 972 decks
+13% synergy
Surrakar Spellblade
22% of 2413 decks
+22% synergy
Prophet of the Scarab
21% of 516 decks
+19% synergy
Lazotep Reaver
21% of 972 decks
+20% synergy
Siren Stormtamer
20% of 2413 decks
+17% synergy
Lotuslight Dancers
20% of 5 decks
+18% synergy
Bladestitched Skaab
20% of 972 decks
+19% synergy
Gateway Sneak
20% of 2413 decks
+20% synergy
Blighted Agent
20% of 2413 decks
+18% synergy
Thrummingbird
20% of 2413 decks
+16% synergy
Malcolm, Alluring Scoundrel
19% of 1862 decks
+17% synergy
Invading Manticore
19% of 470 decks
+19% synergy
Ratadrabik of Urborg
19% of 230 decks
+16% synergy
Eternal Taskmaster
19% of 972 decks
+19% synergy
Triskaidekaphile
19% of 2413 decks
+16% synergy
Dreadhorde Arcanist
19% of 470 decks
+18% synergy
Plague Myr
18% of 2413 decks
+17% synergy
Mindclaw Shaman
18% of 470 decks
+18% synergy
Phyrexian Digester
18% of 2413 decks
+18% synergy
Instants
Swords to Plowshares
42% of 364 decks
-21% synergy
Despark
40% of 230 decks
+25% synergy
Negate
36% of 2413 decks
+14% synergy
Lazotep Plating
26% of 2413 decks
+24% synergy
Reality Shift
24% of 2413 decks
+15% synergy
Aetherize
24% of 2413 decks
+18% synergy
Path to Exile
24% of 364 decks
-23% synergy
Tyrant's Scorn
23% of 972 decks
+23% synergy
Rapid Hybridization
22% of 2413 decks
+13% synergy
Brainstorm
20% of 2413 decks
+0% synergy
Arcane Denial
20% of 2413 decks
-1% synergy
Pongify
19% of 2413 decks
+8% synergy
Soul Manipulation
17% of 972 decks
+17% synergy
Countersquall
17% of 972 decks
+15% synergy
Bedevil
16% of 374 decks
+3% synergy
Prologue to Phyresis
16% of 2413 decks
+15% synergy
High Tide
16% of 2413 decks
+12% synergy
Experimental Augury
16% of 2413 decks
+13% synergy
Beast Within
15% of 168 decks
-22% synergy
Commence the Endgame
15% of 2413 decks
+14% synergy
An Offer You Can't Refuse
15% of 2413 decks
-7% synergy
Heroic Intervention
14% of 168 decks
-16% synergy
Terminate
14% of 374 decks
-6% synergy
Opt
13% of 2413 decks
+4% synergy
Void Rend
13% of 230 decks
-1% synergy
Serum Snare
13% of 2413 decks
+12% synergy
Magmaquake
12% of 470 decks
+11% synergy
Generous Gift
11% of 364 decks
-14% synergy
Murder
11% of 972 decks
+8% synergy
Resculpt
11% of 2413 decks
+6% synergy
Anguished Unmaking
11% of 230 decks
-13% synergy
Steady Progress
11% of 2413 decks
+10% synergy
Dark Ritual
10% of 972 decks
-12% synergy
Mana Drain
10% of 2413 decks
-5% synergy
Disdainful Stroke
10% of 2413 decks
+8% synergy
Chaos Warp
10% of 470 decks
-22% synergy
Parting Gust
10% of 228 decks
+8% synergy
Growth Spiral
10% of 168 decks
-12% synergy
Time to Reflect
9% of 364 decks
+9% synergy
Crush Dissent
9% of 2413 decks
+9% synergy
Imp's Mischief
9% of 972 decks
+6% synergy
Aetherspouts
9% of 2413 decks
+7% synergy
Swan Song
9% of 2413 decks
-8% synergy
Cancel
8% of 2413 decks
+7% synergy
Unwind
8% of 2413 decks
+5% synergy
Village Rites
8% of 972 decks
-2% synergy
Cloudshift
8% of 364 decks
+5% synergy
Dovin's Veto
8% of 364 decks
-10% synergy
Chandra's Defeat
8% of 470 decks
+8% synergy
Frantic Search
8% of 2413 decks
-5% synergy
Sorceries
Honor the God-Pharaoh
41% of 470 decks
+41% synergy
Widespread Brutality
38% of 374 decks
+37% synergy
Invade the City
31% of 470 decks
+30% synergy
Cultivate
27% of 168 decks
-18% synergy
Farseek
25% of 168 decks
-9% synergy
Enter the God-Eternals
25% of 972 decks
+24% synergy
Torment of Hailfire
24% of 972 decks
+19% synergy
Rampant Growth
23% of 168 decks
-12% synergy
Deliver Unto Evil
23% of 972 decks
+22% synergy
Army of the Damned
23% of 972 decks
+21% synergy
Damn
22% of 230 decks
+5% synergy
Apex of Power
22% of 470 decks
+21% synergy
Zombie Apocalypse
22% of 972 decks
+20% synergy
Tormenting Voice
20% of 470 decks
+17% synergy
Stolen Identity
18% of 2413 decks
+17% synergy
Notorious Throng
17% of 2413 decks
+16% synergy
Contentious Plan
16% of 2413 decks
+15% synergy
Kodama's Reach
15% of 168 decks
-15% synergy
Nature's Lore
15% of 168 decks
-16% synergy
Command the Dreadhorde
15% of 972 decks
+14% synergy
Tezzeret's Gambit
14% of 2413 decks
+11% synergy
Ponder
14% of 2413 decks
+1% synergy
Crux of Fate
13% of 972 decks
+11% synergy
Feed the Swarm
12% of 972 decks
-5% synergy
Ravenform
12% of 2413 decks
+10% synergy
Victimize
12% of 972 decks
+0% synergy
Preordain
12% of 2413 decks
+2% synergy
Blasphemous Act
12% of 470 decks
-21% synergy
Arm with Aether
12% of 2413 decks
+12% synergy
Fraying Omnipotence
12% of 972 decks
+11% synergy
Dusk // Dawn
11% of 364 decks
+7% synergy
Damnation
11% of 972 decks
+3% synergy
Approach of the Second Sun
11% of 364 decks
+7% synergy
Three Visits
11% of 168 decks
-14% synergy
Curse of the Swine
11% of 2413 decks
+6% synergy
Time Wipe
10% of 364 decks
+4% synergy
Dark Salvation
10% of 972 decks
+9% synergy
Finale of Promise
10% of 470 decks
+9% synergy
The Elderspell
10% of 972 decks
+9% synergy
Bleeding Edge
9% of 972 decks
+9% synergy
Finale of Eternity
9% of 972 decks
+8% synergy
Distorted Curiosity
9% of 2413 decks
+8% synergy
Callous Dismissal
8% of 2413 decks
+8% synergy
Empty the Laboratory
8% of 2413 decks
+7% synergy
Distant Melody
8% of 2413 decks
+3% synergy
Unconventional Tactics
8% of 364 decks
+8% synergy
Supreme Verdict
8% of 364 decks
-6% synergy
Dread Summons
8% of 972 decks
+7% synergy
Reanimate
8% of 972 decks
-9% synergy
Diabolic Tutor
8% of 972 decks
+1% synergy
Utility Artifacts
Bident of Thassa
34% of 2413 decks
+27% synergy
Swiftfoot Boots
26% of 2413 decks
-2% synergy
Quietus Spike
22% of 2413 decks
+22% synergy
Lightning Greaves
21% of 2413 decks
-4% synergy
Kefnet's Monument
21% of 2413 decks
+20% synergy
Mind Stone
21% of 2413 decks
+4% synergy
Sapphire Medallion
19% of 2413 decks
+17% synergy
Commander's Sphere
17% of 2413 decks
+2% synergy
Wand of Orcus
13% of 972 decks
+12% synergy
Bloodforged Battle-Axe
12% of 2413 decks
+11% synergy
Prosthetic Injector
12% of 2413 decks
+12% synergy
Mask of Memory
11% of 2413 decks
+10% synergy
Crowded Crypt
11% of 972 decks
+10% synergy
Ovalchase Dragster
11% of 2413 decks
+11% synergy
Throne of the God-Pharaoh
10% of 2413 decks
+10% synergy
Wayfarer's Bauble
10% of 2413 decks
+0% synergy
Cursecloth Wrappings
10% of 262 decks
+9% synergy
Cryptcaller Chariot
9% of 268 decks
+8% synergy
God-Pharaoh's Gift
8% of 2413 decks
+8% synergy
Fireshrieker
8% of 2413 decks
+7% synergy
Captain's Claws
8% of 2413 decks
+8% synergy
Explorer's Scope
8% of 2413 decks
+7% synergy
God-Pharaoh's Statue
7% of 2413 decks
+7% synergy
The Indomitable
7% of 1850 decks
+6% synergy
Umezawa's Jitte
7% of 2413 decks
+7% synergy
Meekstone
6% of 2413 decks
+6% synergy
Prying Blade
6% of 2413 decks
+5% synergy
Gem of Becoming
5% of 2413 decks
+5% synergy
Goggles of Night
5% of 2413 decks
+5% synergy
Rogue's Gloves
5% of 2413 decks
+5% synergy
Enchantments
Dreadhorde Invasion
36% of 972 decks
+33% synergy
Reconnaissance Mission
32% of 2413 decks
+27% synergy
Endless Ranks of the Dead
31% of 972 decks
+29% synergy
Leyline of Mutation
28% of 25 decks
+23% synergy
Liliana's Mastery
26% of 972 decks
+25% synergy
Coastal Piracy
24% of 2413 decks
+22% synergy
The Eldest Reborn
22% of 972 decks
+20% synergy
Military Intelligence
20% of 2413 decks
+19% synergy
Rooftop Storm
20% of 2413 decks
+18% synergy
Propaganda
19% of 2413 decks
+7% synergy
Curiosity
16% of 2413 decks
+12% synergy
Anointed Procession
15% of 364 decks
+7% synergy
Feywild Visitor
15% of 2413 decks
+15% synergy
Graf Harvest
15% of 972 decks
+14% synergy
Necroduality
14% of 2413 decks
+13% synergy
Open the Graves
14% of 972 decks
+13% synergy
Imminent Doom
12% of 470 decks
+12% synergy
Prison Realm
11% of 364 decks
+11% synergy
Teferi's Ageless Insight
11% of 2413 decks
+6% synergy
Necromancer's Covenant
10% of 230 decks
+10% synergy
Phyrexian Arena
10% of 972 decks
-6% synergy
The Elder Dragon War
10% of 470 decks
+9% synergy
Leyline of the Guildpact
9% of 43 decks
-6% synergy
Sigil of Sleep
9% of 2413 decks
+9% synergy
Patient Rebuilding
8% of 2413 decks
+8% synergy
Imprisoned in the Moon
8% of 2413 decks
+4% synergy
Ominous Seas
8% of 2413 decks
+5% synergy
Witness Protection
8% of 2413 decks
+6% synergy
Sultai Ascendancy
8% of 104 decks
+6% synergy
Ghoulish Procession
7% of 972 decks
+7% synergy
Wizard Class
7% of 2413 decks
+3% synergy
In Bolas's Clutches
7% of 2413 decks
+7% synergy
Inexorable Tide
7% of 2413 decks
+4% synergy
Kindred Discovery
7% of 2413 decks
-1% synergy
Corrupted Conscience
6% of 2413 decks
+6% synergy
Far Traveler
6% of 364 decks
+5% synergy
Blood Reckoning
6% of 972 decks
+6% synergy
Thopter Spy Network
6% of 2413 decks
+3% synergy
Mystic Remora
6% of 2413 decks
-11% synergy
Cast Out
6% of 364 decks
+5% synergy
Ghostly Prison
6% of 364 decks
-6% synergy
Mindless Conscription
5% of 567 decks
+5% synergy
Dissipation Field
5% of 2413 decks
+5% synergy
Psychic Corrosion
5% of 2413 decks
+3% synergy
Curse of the Restless Dead
5% of 972 decks
+4% synergy
Battles
Invasion of Amonkhet
11% of 972 decks
+10% synergy
Planeswalkers
Liliana, Dreadhorde General
23% of 972 decks
+19% synergy
Liliana, Death's Majesty
22% of 972 decks
+20% synergy
Angrath, Captain of Chaos
18% of 374 decks
+17% synergy
Kaito, Cunning Infiltrator
8% of 815 decks
+7% synergy
Liliana, Untouched by Death
7% of 972 decks
+7% synergy
Liliana, the Last Hope
6% of 972 decks
+6% synergy
Niko Aris
6% of 364 decks
+5% synergy
Jace, Wielder of Mysteries
6% of 2413 decks
+2% synergy
Tezzeret, Agent of Bolas
5% of 972 decks
+5% synergy
Utility Lands
Reliquary Tower
44% of 2413 decks
+15% synergy
Mystic Sanctuary
24% of 2413 decks
+12% synergy
Bojuka Bog
16% of 972 decks
-14% synergy
Karn's Bastion
15% of 2413 decks
+10% synergy
Lonely Sandbar
15% of 2413 decks
+11% synergy
Desert of the True
15% of 364 decks
+13% synergy
Accursed Duneyard
15% of 516 decks
+13% synergy
Unholy Grotto
12% of 972 decks
+11% synergy
Rogue's Passage
12% of 2413 decks
-8% synergy
Mortuary Mire
12% of 972 decks
+7% synergy
Temple of the False God
11% of 2413 decks
+1% synergy
Nykthos, Shrine to Nyx
10% of 2413 decks
+5% synergy
Otawara, Soaring City
10% of 2413 decks
-6% synergy
Desert of the Mindful
10% of 2413 decks
+9% synergy
Castle Vantress
10% of 2413 decks
+6% synergy
Desert of the Glorified
9% of 972 decks
+8% synergy
Rivendell
8% of 2240 decks
+4% synergy
Halimar Depths
7% of 2413 decks
+5% synergy
Desert of the Fervent
7% of 470 decks
+6% synergy
Cabal Coffers
7% of 972 decks
-3% synergy
Inkmoth Nexus
7% of 2413 decks
+6% synergy
Scavenger Grounds
7% of 2413 decks
+3% synergy
War Room
6% of 2413 decks
+0% synergy
Faerie Conclave
6% of 2413 decks
+5% synergy
Shefet Dunes
6% of 364 decks
+5% synergy
Field of the Dead
6% of 2413 decks
+2% synergy
Kishla Village
6% of 18 decks
+5% synergy
Remote Isle
5% of 2413 decks
+4% synergy
Vault of the Archangel
5% of 230 decks
-6% synergy
Mana Artifacts
Sol Ring
75% of 2413 decks
-10% synergy
Arcane Signet
57% of 2413 decks
-16% synergy
Visage of Bolas
54% of 374 decks
+53% synergy
Thought Vessel
33% of 2413 decks
+16% synergy
Dimir Signet
33% of 972 decks
+4% synergy
Izzet Signet
29% of 470 decks
+2% synergy
Talisman of Dominance
29% of 972 decks
-3% synergy
Rakdos Signet
28% of 374 decks
-1% synergy
Talisman of Hierarchy
28% of 230 decks
+3% synergy
Orzhov Signet
23% of 230 decks
-3% synergy
Talisman of Indulgence
23% of 374 decks
-4% synergy
Talisman of Progress
20% of 364 decks
-4% synergy
Azorius Signet
20% of 364 decks
-5% synergy
Talisman of Creativity
19% of 470 decks
-10% synergy
Strixhaven Stadium
16% of 2413 decks
+16% synergy
Sky Diamond
16% of 2413 decks
+11% synergy
Decanter of Endless Water
14% of 2413 decks
+10% synergy
Obelisk of Grixis
14% of 374 decks
+13% synergy
Fellwar Stone
11% of 2413 decks
-10% synergy
Simic Signet
10% of 168 decks
-4% synergy
Relic of Sauron
9% of 328 decks
+1% synergy
Midnight Clock
9% of 2413 decks
+3% synergy
Golgari Signet
7% of 104 decks
-6% synergy
Boros Signet
7% of 91 decks
-16% synergy
Patchwork Banner
6% of 1172 decks
+1% synergy
Charcoal Diamond
6% of 972 decks
+1% synergy
Talisman of Curiosity
6% of 168 decks
-7% synergy
Staff of Compleation
6% of 2413 decks
+5% synergy
Lands
Crumbling Necropolis
59% of 374 decks
+28% synergy
Arcane Sanctum
44% of 230 decks
+16% synergy
Crypt of the Eternals
44% of 374 decks
+43% synergy
Sunken Hollow
40% of 972 decks
+5% synergy
Xander's Lounge
39% of 374 decks
+13% synergy
Command Tower
37% of 2413 decks
-37% synergy
Dragonskull Summit
36% of 374 decks
+4% synergy
Prairie Stream
35% of 364 decks
+2% synergy
Sacred Foundry
35% of 91 decks
-0% synergy
Sulfur Falls
34% of 470 decks
+2% synergy
Raugrin Triome
34% of 91 decks
+8% synergy
Savai Triome
34% of 68 decks
+7% synergy
Blood Crypt
34% of 374 decks
-4% synergy
Ketria Triome
33% of 81 decks
+1% synergy
Stomping Ground
33% of 81 decks
-7% synergy
Glacial Fortress
32% of 364 decks
+5% synergy
Steam Vents
32% of 470 decks
-6% synergy
Drowned Catacomb
32% of 972 decks
+5% synergy
Isolated Chapel
31% of 230 decks
+1% synergy
The World Tree
30% of 67 decks
-2% synergy
Breeding Pool
29% of 168 decks
-12% synergy
Ziatora's Proving Ground
28% of 71 decks
-2% synergy
Overgrown Tomb
28% of 104 decks
-14% synergy
Godless Shrine
27% of 230 decks
-13% synergy
Temple of Deceit
27% of 972 decks
+10% synergy
Smoldering Marsh
27% of 374 decks
-6% synergy
Caves of Koilos
27% of 230 decks
-3% synergy
Dimir Aqueduct
26% of 972 decks
+10% synergy
Watery Grave
26% of 972 decks
-14% synergy
Dismal Backwater
26% of 972 decks
+19% synergy
Irrigated Farmland
26% of 364 decks
+18% synergy
Hallowed Fountain
26% of 364 decks
-15% synergy
Choked Estuary
24% of 972 decks
+8% synergy
Adarkar Wastes
24% of 364 decks
+4% synergy
Myriad Landscape
24% of 2413 decks
+5% synergy
Raffine's Tower
23% of 230 decks
-4% synergy
Zagoth Triome
22% of 104 decks
-8% synergy
Hinterland Harbor
22% of 168 decks
-7% synergy
Jetmir's Garden
22% of 69 decks
-9% synergy
Temple of Mystery
20% of 168 decks
+3% synergy
Cinder Barrens
20% of 374 decks
+19% synergy
Spara's Headquarters
20% of 85 decks
-10% synergy
Indatha Triome
20% of 71 decks
-10% synergy
Evolving Wilds
19% of 2413 decks
-2% synergy
Thornwood Falls
19% of 168 decks
+12% synergy
Shipwreck Marsh
19% of 972 decks
+0% synergy
Mystic Monastery
19% of 91 decks
-9% synergy
Seething Landscape
18% of 195 decks
+9% synergy
Luxury Suite
18% of 374 decks
-8% synergy
Training Center
18% of 470 decks
-8% synergy