Orcus, Prince of Undeath (Card)
Orcus, Prince of Undeath
In 14103 decks
1% of 1143701 decks
Jan 5, 2023
The 600 - A Review of AFR Commanders
Just how popular did the Forgotten Realms commanders end up?
Jan 4, 2022
Epic Experiment - Orcus's Lightning Ball
Can Bernardo transform this underwhelming commander into an over-achiever?
Be'lakor, the Dark Master
31.28% of 11079 decks
3466 decks
Rakdos, Lord of Riots
41.57% of 7565 decks
3145 decks
Raphael, Fiendish Savior
48.86% of 4091 decks
1999 decks
Rowan, Scion of War
9.69% of 8702 decks
843 decks
Rakdos, the Showstopper
41.51% of 1207 decks
501 decks
Dihada, Binder of Wills
2.64% of 9727 decks
257 decks
Henzie "Toolbox" Torre
1.63% of 14929 decks
243 decks
Kaalia of the Vast
0.91% of 21269 decks
194 decks
Rakdos, Patron of Chaos
23.36% of 762 decks
178 decks
Chainer, Nightmare Adept
4.14% of 3140 decks
130 decks
Prosper, Tome-Bound
0.90% of 13185 decks
119 decks
Kardur, Doomscourge
2.17% of 5105 decks
111 decks
Niv-Mizzet Reborn
2.68% of 4105 decks
110 decks
Kalain, Reclusive Painter
14.75% of 739 decks
109 decks
Ziatora, the Incinerator
1.26% of 8148 decks
103 decks
Ognis, the Dragon's Lash
1.99% of 4933 decks
98 decks
Kaalia, Zenith Seeker
11.94% of 620 decks
74 decks
Valgavoth, Harrower of Souls
0.75% of 9100 decks
68 decks
New Cards
Sower of Chaos
86% of 28 decks
+80% synergy
Stab
60% of 5 decks
+16% synergy
Infernal Vessel
48% of 54 decks
+39% synergy
Sanguine Syphoner
48% of 133 decks
+29% synergy
Abyssal Harvester
45% of 594 decks
+29% synergy
High Synergy Cards
Lord of Change
61% of 4088 decks
+60% synergy
Kardur, Doomscourge
53% of 14102 decks
+46% synergy
Herald of Slaanesh
47% of 13307 decks
+46% synergy
Rakdos, Patron of Chaos
50% of 6046 decks
+45% synergy
Gyruda, Doom of Depths
45% of 4194 decks
+43% synergy
Lord Xander, the Collector
42% of 4169 decks
+40% synergy
Rakdos, the Showstopper
40% of 14102 decks
+39% synergy
Reflections of Littjara
43% of 4194 decks
+38% synergy
Demonic Counsel
41% of 2312 decks
+37% synergy
Harvester of Souls
39% of 14103 decks
+37% synergy
Top Cards
Chaos Warp
48% of 14102 decks
+16% synergy
Blasphemous Act
48% of 14102 decks
+15% synergy
Terminate
47% of 14102 decks
+26% synergy
Bedevil
46% of 14102 decks
+31% synergy
Rakdos Charm
45% of 14102 decks
+30% synergy
Séance Board
44% of 1542 decks
+42% synergy
Feed the Swarm
43% of 14103 decks
+25% synergy
Counterspell
42% of 4194 decks
-0% synergy
Dark Ritual
41% of 14103 decks
+18% synergy
Ancient Cellarspawn
40% of 1719 decks
+35% synergy
Creatures
Faeburrow Elder
39% of 398 decks
+28% synergy
Archfiend of Depravity
36% of 14103 decks
+34% synergy
Spinner of Souls
36% of 25 decks
+28% synergy
Bloodletter of Aclazotz
36% of 7340 decks
+31% synergy
Rune-Scarred Demon
35% of 14103 decks
+33% synergy
Exalted Flamer of Tzeentch
35% of 4088 decks
+32% synergy
Varragoth, Bloodsky Sire
35% of 14103 decks
+33% synergy
Rakdos, Lord of Riots
34% of 14102 decks
+32% synergy
Bloodthirster
34% of 13307 decks
+32% synergy
Bloodgift Demon
33% of 14103 decks
+32% synergy
Balor
33% of 13828 decks
+32% synergy
Raphael, Fiendish Savior
33% of 13828 decks
+31% synergy
Vilis, Broker of Blood
32% of 14103 decks
+28% synergy
Great Unclean One
29% of 13308 decks
+28% synergy
Shanid, Sleepers' Scourge
28% of 1081 decks
+23% synergy
Indulgent Tormentor
27% of 14103 decks
+26% synergy
Ignoble Hierarch
27% of 1169 decks
+1% synergy
Honest Rutstein
26% of 386 decks
+18% synergy
Perforating Artist
26% of 594 decks
+12% synergy
Valgavoth, Terror Eater
26% of 2312 decks
+21% synergy
Sower of Discord
25% of 14103 decks
+24% synergy
Liesa, Forgotten Archangel
25% of 1150 decks
+21% synergy
Ob Nixilis, Unshackled
25% of 14103 decks
+24% synergy
Hidetsugu and Kairi
24% of 3236 decks
+23% synergy
Valgavoth, Harrower of Souls
24% of 2311 decks
+20% synergy
Burning-Rune Demon
24% of 14103 decks
+23% synergy
Solemn Simulacrum
24% of 14103 decks
+10% synergy
Cadric, Soul Kindler
24% of 1081 decks
+22% synergy
Dream Devourer
23% of 14103 decks
+22% synergy
Sakura-Tribe Elder
23% of 1169 decks
+5% synergy
Hidetsugu, Devouring Chaos
23% of 13932 decks
+22% synergy
Reaper from the Abyss
23% of 14103 decks
+22% synergy
The Balrog of Moria
23% of 9297 decks
+20% synergy
Plague Drone
23% of 13308 decks
+22% synergy
Odric, Lunarch Marshal
22% of 1171 decks
+20% synergy
Rakdos, the Muscle
22% of 4687 decks
+20% synergy
Bloodcrusher of Khorne
22% of 13307 decks
+21% synergy
Stormfist Crusader
21% of 14102 decks
+17% synergy
Aurelia, the Warleader
21% of 1171 decks
+14% synergy
Spark Double
20% of 4194 decks
+13% synergy
Sin Prodder
20% of 14102 decks
+20% synergy
Ratadrabik of Urborg
20% of 1081 decks
+17% synergy
Heralds of Tzeentch
20% of 4088 decks
+20% synergy
Arvad the Cursed
20% of 1171 decks
+18% synergy
Gisela, Blade of Goldnight
20% of 1171 decks
+13% synergy
Mahadi, Emporium Master
19% of 13828 decks
+13% synergy
Demonlord Belzenlok
19% of 14103 decks
+19% synergy
Archfiend of Despair
19% of 14103 decks
+18% synergy
Birds of Paradise
19% of 1169 decks
-8% synergy
Jegantha, the Wellspring
19% of 374 decks
+13% synergy
Instants
Ghostly Flicker
37% of 4194 decks
+32% synergy
Withering Torment
30% of 1941 decks
+11% synergy
Brainstorm
30% of 4194 decks
+9% synergy
Swords to Plowshares
29% of 1171 decks
-33% synergy
Growth Spiral
26% of 395 decks
+4% synergy
Planar Genesis
24% of 68 decks
+16% synergy
Anguished Unmaking
23% of 1171 decks
-1% synergy
Generous Gift
23% of 1171 decks
-3% synergy
Path to Exile
22% of 1171 decks
-24% synergy
Mortify
21% of 1171 decks
+9% synergy
Cyclonic Rift
21% of 4194 decks
-7% synergy
Essence Flux
20% of 4194 decks
+17% synergy
Blood for the Blood God!
19% of 13307 decks
+16% synergy
Negate
19% of 4194 decks
-4% synergy
Despark
19% of 1171 decks
+4% synergy
Boros Charm
19% of 1171 decks
-6% synergy
Assassin's Trophy
17% of 1169 decks
-13% synergy
Beast Within
17% of 1169 decks
-22% synergy
Dovin's Veto
17% of 379 decks
-2% synergy
Displace
16% of 4194 decks
+15% synergy
Arcane Denial
16% of 4194 decks
-4% synergy
Crackling Doom
15% of 1171 decks
+7% synergy
Wear // Tear
14% of 1171 decks
+6% synergy
Fell the Profane
14% of 3699 decks
+2% synergy
Malakir Rebirth
14% of 14103 decks
+5% synergy
Lightning Bolt
13% of 14102 decks
+3% synergy
Infernal Grasp
13% of 14035 decks
+6% synergy
Utter End
13% of 1171 decks
+6% synergy
Thrill of Possibility
13% of 14102 decks
+3% synergy
Planar Incision
13% of 4169 decks
+12% synergy
Deadly Dispute
13% of 14103 decks
+1% synergy
Mana Drain
12% of 4194 decks
-3% synergy
Village Rites
12% of 14103 decks
+2% synergy
An Offer You Can't Refuse
12% of 4169 decks
-9% synergy
Unbreakable Formation
12% of 1171 decks
+5% synergy
Riveteers Charm
11% of 1137 decks
+8% synergy
Putrefy
11% of 1169 decks
-5% synergy
Deflecting Swat
10% of 14102 decks
-6% synergy
Teferi's Time Twist
10% of 4194 decks
+9% synergy
Untimely Malfunction
10% of 2025 decks
-6% synergy
Abrade
9% of 14102 decks
-2% synergy
Chaos Mutation
9% of 4088 decks
+8% synergy
Vampiric Tutor
9% of 14103 decks
-9% synergy
Not Dead After All
9% of 8215 decks
+5% synergy
Legion Leadership
9% of 242 decks
+1% synergy
Deadly Rollick
8% of 14103 decks
-3% synergy
Revitalizing Repast
8% of 298 decks
-4% synergy
Tibalt's Trickery
8% of 14102 decks
+3% synergy
Teferi's Protection
8% of 1171 decks
-12% synergy
Fierce Guardianship
8% of 4194 decks
-11% synergy
Sorceries
Rite of Replication
35% of 4194 decks
+32% synergy
Farseek
33% of 1169 decks
-1% synergy
Primevals' Glorious Rebirth
33% of 1171 decks
+29% synergy
Cultivate
30% of 1169 decks
-16% synergy
Rampant Growth
29% of 1169 decks
-5% synergy
Urza's Ruinous Blast
29% of 1171 decks
+26% synergy
Boltwave
28% of 594 decks
+10% synergy
Nature's Lore
26% of 1169 decks
-6% synergy
Vandalblast
25% of 14102 decks
+9% synergy
Sign in Blood
25% of 14103 decks
+15% synergy
Blasphemous Edict
22% of 730 decks
-11% synergy
Reanimate
22% of 14103 decks
+6% synergy
Victimize
22% of 14103 decks
+10% synergy
Read the Bones
21% of 14103 decks
+13% synergy
Bring to Light
21% of 395 decks
+19% synergy
Faithless Looting
20% of 14102 decks
+4% synergy
Three Visits
19% of 1169 decks
-5% synergy
Ruinous Ultimatum
19% of 1171 decks
+0% synergy
Kodama's Reach
18% of 1169 decks
-14% synergy
Demonic Tutor
17% of 14103 decks
-5% synergy
Time Wipe
16% of 379 decks
+9% synergy
Night's Whisper
16% of 14103 decks
+7% synergy
Damn
15% of 1171 decks
-1% synergy
Patriarch's Bidding
15% of 14103 decks
+12% synergy
Toxic Deluge
15% of 14103 decks
-3% synergy
Vindicate
14% of 1171 decks
+7% synergy
Supreme Verdict
14% of 379 decks
-0% synergy
Bloodsoaked Insight
13% of 3698 decks
+9% synergy
Jeska's Will
13% of 14102 decks
-4% synergy
Mandate of Abaddon
13% of 13308 decks
+12% synergy
Dreadbore
13% of 14102 decks
+10% synergy
Kaya's Wrath
11% of 1171 decks
+8% synergy
Burn Down the House
11% of 14034 decks
+10% synergy
Kindred Dominance
10% of 14103 decks
+6% synergy
Damnation
10% of 14103 decks
+2% synergy
Life's Legacy
10% of 1169 decks
+8% synergy
Flame Rift
10% of 14102 decks
+9% synergy
Rise of the Witch-king
9% of 691 decks
+3% synergy
Exsanguinate
9% of 14103 decks
+3% synergy
Merciless Eviction
9% of 1171 decks
+5% synergy
Irenicus's Vile Duplication
9% of 4154 decks
+6% synergy
Grab the Prize
9% of 1986 decks
+2% synergy
Dread Return
9% of 14103 decks
+4% synergy
Doppelgang
9% of 113 decks
+5% synergy
Unburial Rites
9% of 1171 decks
+6% synergy
Decree of Pain
9% of 14103 decks
+6% synergy
Sevinne's Reclamation
8% of 1171 decks
+1% synergy
Diabolic Tutor
8% of 14103 decks
+2% synergy
Austere Command
8% of 1171 decks
-5% synergy
Decimate
8% of 1169 decks
-1% synergy
Utility Artifacts
Lightning Greaves
35% of 14103 decks
+9% synergy
Swiftfoot Boots
33% of 14103 decks
+5% synergy
Whip of Erebos
23% of 14103 decks
+20% synergy
Wayfarer's Bauble
23% of 14103 decks
+13% synergy
Herald's Horn
20% of 14103 decks
+14% synergy
Cryptolith Fragment
16% of 14103 decks
+15% synergy
Urza's Incubator
15% of 14103 decks
+12% synergy
Bontu's Monument
13% of 14103 decks
+11% synergy
Panharmonicon
11% of 14103 decks
+7% synergy
Bolas's Citadel
11% of 14103 decks
+2% synergy
Door to Nothingness
9% of 374 decks
+5% synergy
Skullclamp
8% of 14103 decks
-5% synergy
Ashnod's Altar
7% of 14103 decks
-0% synergy
Elbrus, the Binding Blade
7% of 14103 decks
+7% synergy
The Great Henge
7% of 1169 decks
-3% synergy
The Skullspore Nexus
7% of 566 decks
+3% synergy
Conjurer's Closet
6% of 14103 decks
+4% synergy
Ravenous Amulet
6% of 133 decks
-4% synergy
Jet Medallion
5% of 14103 decks
+2% synergy
Enchantments
Liliana's Contract
35% of 14103 decks
+34% synergy
Unholy Annex // Ritual Chamber
33% of 1941 decks
+28% synergy
Demonic Covenant
28% of 1542 decks
+26% synergy
Rakdos Joins Up
27% of 4366 decks
+24% synergy
Leyline of Mutation
27% of 15 decks
+11% synergy
Phyrexian Arena
26% of 14103 decks
+10% synergy
Warstorm Surge
25% of 14102 decks
+20% synergy
Mirari's Wake
20% of 398 decks
+6% synergy
Riveteers Ascendancy
19% of 1137 decks
+14% synergy
Rhythm of the Wild
18% of 1169 decks
-6% synergy
Garruk's Uprising
17% of 1169 decks
+1% synergy
Kindred Discovery
17% of 4194 decks
+10% synergy
Virtue of Knowledge
15% of 2375 decks
+12% synergy
Descent into Avernus
14% of 13828 decks
+11% synergy
Rhystic Study
14% of 4194 decks
-13% synergy
Theater of Horrors
14% of 14102 decks
+12% synergy
Black Market Connections
14% of 13829 decks
+3% synergy
Flowering of the White Tree
14% of 629 decks
+8% synergy
Annie Joins Up
13% of 89 decks
-5% synergy
Widespread Thieving
13% of 355 decks
+11% synergy
Rising of the Day
13% of 9935 decks
+7% synergy
Sanctum of Stone Fangs
12% of 14103 decks
+11% synergy
Animate Dead
12% of 14103 decks
+2% synergy
Molten Echoes
11% of 14102 decks
+10% synergy
Dazzling Theater // Prop Room
11% of 36 decks
-6% synergy
Heartless Summoning
11% of 14103 decks
+10% synergy
Day of Destiny
11% of 1171 decks
+10% synergy
Buried in the Garden
10% of 114 decks
+8% synergy
Impact Tremors
9% of 14102 decks
-0% synergy
Smothering Tithe
9% of 1171 decks
-15% synergy
Black Market
9% of 14103 decks
+5% synergy
Leyline of the Guildpact
9% of 100 decks
-14% synergy
Mayael's Aria
9% of 398 decks
+6% synergy
Sarkhan's Unsealing
9% of 14102 decks
+8% synergy
Spiked Corridor // Torture Pit
9% of 1541 decks
+3% synergy
Walk-In Closet // Forgotten Cellar
8% of 48 decks
-4% synergy
Greater Good
8% of 1169 decks
+3% synergy
Evolutionary Leap
8% of 1169 decks
+7% synergy
Goblin Bombardment
8% of 14102 decks
+1% synergy
The Kenriths' Royal Funeral
8% of 814 decks
+7% synergy
Simic Ascendancy
7% of 395 decks
+2% synergy
The Apprentice's Folly
7% of 2331 decks
+6% synergy
Journey to Eternity
7% of 1169 decks
+4% synergy
Exquisite Blood
7% of 14103 decks
+2% synergy
Up the Beanstalk
7% of 589 decks
+2% synergy
Phyrexian Reclamation
6% of 14103 decks
+3% synergy
Monstrous Vortex
6% of 267 decks
+4% synergy
Vraska Joins Up
6% of 363 decks
+1% synergy
Sneak Attack
6% of 14102 decks
+4% synergy
Nahiri's Resolve
6% of 712 decks
+4% synergy
Battles
Invasion of Alara
7% of 245 decks
+4% synergy
Planeswalkers
Ob Nixilis, the Adversary
20% of 13895 decks
+19% synergy
Kaya the Inexorable
13% of 1171 decks
+11% synergy
Zariel, Archduke of Avernus
12% of 14102 decks
+11% synergy
Dihada, Binder of Wills
9% of 1081 decks
+4% synergy
Kiora, Behemoth Beckoner
7% of 395 decks
+4% synergy
Oko, Thief of Crowns
7% of 395 decks
+1% synergy
Tibalt, Rakish Instigator
5% of 14102 decks
+5% synergy
Utility Lands
Bojuka Bog
37% of 14103 decks
+7% synergy
Reliquary Tower
24% of 14103 decks
-6% synergy
Urborg, Tomb of Yawgmoth
20% of 14103 decks
+10% synergy
Temple of the False God
16% of 14103 decks
+6% synergy
Rogue's Passage
14% of 14103 decks
-5% synergy
Kessig Wolf Run
14% of 1169 decks
-2% synergy
Eiganjo, Seat of the Empire
13% of 1123 decks
+5% synergy
Arena of Glory
13% of 3392 decks
+4% synergy
Minas Tirith
13% of 665 decks
+4% synergy
Cabal Coffers
11% of 14103 decks
+1% synergy
Mosswort Bridge
10% of 1169 decks
+0% synergy
Takenuma, Abandoned Mire
10% of 13933 decks
-0% synergy
Westvale Abbey
10% of 14103 decks
+8% synergy
Boseiju, Who Endures
9% of 1137 decks
-11% synergy
Otawara, Soaring City
9% of 4169 decks
-8% synergy
Leechridden Swamp
8% of 14103 decks
+7% synergy
Spinerock Knoll
8% of 14102 decks
+4% synergy
Three Tree City
8% of 2761 decks
-2% synergy
Castle Locthwain
8% of 14103 decks
+2% synergy
Mortuary Mire
7% of 14103 decks
+2% synergy
Vault of the Archangel
7% of 1171 decks
-4% synergy
Ancient Tomb
7% of 14103 decks
-3% synergy
Monumental Henge
7% of 228 decks
+3% synergy
Shizo, Death's Storehouse
6% of 14103 decks
+1% synergy
Molten Slagheap
6% of 14102 decks
+5% synergy
Forgotten Cave
6% of 14102 decks
+1% synergy
Barren Moor
6% of 14103 decks
+2% synergy
Restless Vents
6% of 6587 decks
+3% synergy
Shifting Woodland
5% of 298 decks
-4% synergy
Mana Artifacts
Sol Ring
83% of 14103 decks
-1% synergy
Arcane Signet
82% of 14103 decks
+9% synergy
Talisman of Dominance
65% of 4194 decks
+33% synergy
Rakdos Signet
59% of 14102 decks
+29% synergy
Talisman of Creativity
58% of 4194 decks
+30% synergy
Talisman of Indulgence
53% of 14102 decks
+26% synergy
Dimir Signet
38% of 4194 decks
+8% synergy
Relic of Sauron
31% of 2763 decks
+20% synergy
Commander's Sphere
30% of 14103 decks
+15% synergy
Orzhov Signet
29% of 1171 decks
+2% synergy
Izzet Signet
28% of 4194 decks
+0% synergy
Fellwar Stone
28% of 14103 decks
+7% synergy
Boros Signet
27% of 1171 decks
+4% synergy
Mind Stone
19% of 14103 decks
+2% synergy
Talisman of Hierarchy
18% of 1171 decks
-6% synergy
Chromatic Lantern
18% of 14103 decks
+8% synergy
Talisman of Conviction
17% of 1171 decks
-6% synergy
Patchwork Banner
13% of 2592 decks
+4% synergy
Thought Vessel
11% of 14103 decks
-5% synergy
Charcoal Diamond
10% of 14103 decks
+5% synergy
Fire Diamond
10% of 14102 decks
+5% synergy
Timeless Lotus
9% of 336 decks
-5% synergy
Golgari Signet
9% of 1169 decks
-4% synergy
Worn Powerstone
8% of 14103 decks
+5% synergy
Gruul Signet
8% of 1169 decks
-4% synergy
Rakdos Locket
6% of 14102 decks
+5% synergy
Talisman of Resilience
6% of 1169 decks
-6% synergy
Thran Dynamo
5% of 14103 decks
+1% synergy
Lands
Command Tower
88% of 14103 decks
+14% synergy
Crumbling Necropolis
67% of 4194 decks
+36% synergy
Smoldering Marsh
58% of 14102 decks
+26% synergy
Sunken Hollow
56% of 4194 decks
+21% synergy
Dragonskull Summit
52% of 14102 decks
+21% synergy
Foreboding Ruins
47% of 14102 decks
+31% synergy
Xander's Lounge
46% of 4169 decks
+19% synergy
Nomad Outpost
45% of 1171 decks
+17% synergy
Blood Crypt
40% of 14102 decks
+2% synergy
Path of Ancestry
40% of 14103 decks
+19% synergy
Watery Grave
40% of 4194 decks
-1% synergy
The World Tree
40% of 374 decks
+6% synergy
Ziatora's Proving Ground
38% of 1137 decks
+7% synergy
Exotic Orchard
38% of 14103 decks
+2% synergy
Rakdos Carnarium
38% of 14102 decks
+23% synergy
Cinder Glade
38% of 1169 decks
-1% synergy
Steam Vents
37% of 4194 decks
-2% synergy
Caves of Koilos
36% of 1171 decks
+8% synergy
Luxury Suite
35% of 14102 decks
+9% synergy
Savage Lands
35% of 1169 decks
+12% synergy
Seething Landscape
35% of 1012 decks
+20% synergy
Battlefield Forge
34% of 1171 decks
+8% synergy
Ketria Triome
34% of 395 decks
+1% synergy
Temple of Malice
33% of 14102 decks
+19% synergy
Indatha Triome
33% of 398 decks
+2% synergy
Stomping Ground
32% of 1169 decks
-9% synergy
Morphic Pool
32% of 4194 decks
+6% synergy
Overgrown Tomb
32% of 1169 decks
-11% synergy
Zagoth Triome
31% of 395 decks
+1% synergy
Sulfurous Springs
31% of 14102 decks
+11% synergy
Evolving Wilds
30% of 14103 decks
+9% synergy
Temple Garden
30% of 398 decks
-10% synergy
Savai Triome
30% of 1171 decks
+3% synergy
Drowned Catacomb
30% of 4194 decks
+4% synergy
Training Center
30% of 4194 decks
+2% synergy
Godless Shrine
29% of 1171 decks
-12% synergy
Haunted Ridge
29% of 14034 decks
+13% synergy
Breeding Pool
29% of 395 decks
-12% synergy
Twisted Landscape
28% of 267 decks
+8% synergy
Raugrin Triome
27% of 379 decks
+1% synergy
Hallowed Fountain
27% of 379 decks
-13% synergy
Blazemire Verge
27% of 2113 decks
+7% synergy
Sulfur Falls
27% of 4194 decks
-4% synergy
Temple of Silence
27% of 1171 decks
+9% synergy
Spara's Headquarters
26% of 355 decks
-5% synergy
Temple of Triumph
26% of 1171 decks
+9% synergy
Sacred Foundry
26% of 1171 decks
-10% synergy
Shattered Landscape
25% of 212 decks
+12% synergy
Tainted Peak
25% of 14102 decks
+15% synergy
Jetmir's Garden
24% of 379 decks
-8% synergy