Unspeakable Symbol + Sage of Hours + Gray Merchant of Asphodel + Conjurer's Closet

Unspeakable Symbol
Sage of Hours
Gray Merchant of Asphodel
Conjurer's Closet

Requires
Unspeakable Symbol must be on the battlefield. Sage of Hours must be on the battlefield. Gray Merchant of Asphodel must be on the battlefield. Conjurer's Closet must be on the battlefield. Your devotion to black times the number of opponents you have is greater than or equal to 15.
Steps
  1. At the beginning of your end step, Conjurer's Closet triggers, blinking Gray Merchant of Asphodel.
  2. When Gray Merchant of Asphodel enters the battlefield, it triggers, causing each opponent to lose life equal to your devotion to black, and you to gain life equal to the life lost this way.
  3. Activate Unspeakable Symbol five times by paying 15 life, putting five +1/+1 counters on Sage of Hours.
  4. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
  5. Repeat each turn.
Results
Infinite turns.

Vren, the Relentless
0.03% of 3519 decks 1 decks
Atraxa, Praetors' Voice
0.00% of 35211 decks 1 decks
Creatures
Myojin of Towering Might
100% of 1 decks +100% synergy
Brimaz, Blight of Oreskos
100% of 1 decks +99% synergy
Phyrexian Swarmlord
100% of 1 decks +99% synergy
Skyskipper Duo
100% of 1 decks +98% synergy
Tekuthal, Inquiry Dominus
100% of 1 decks +97% synergy
Thassa, Deep-Dwelling
100% of 2 decks +97% synergy
Bloodroot Apothecary
100% of 1 decks +96% synergy
Master Biomancer
100% of 1 decks +96% synergy
Vorinclex, Monstrous Raider
100% of 1 decks +96% synergy
Ezuri, Stalker of Spheres
100% of 1 decks +96% synergy
Dreamtide Whale
100% of 1 decks +96% synergy
Evolution Sage
100% of 1 decks +93% synergy
Pollywog Prodigy
100% of 1 decks +87% synergy
Cadaverous Knight
50% of 2 decks +50% synergy
Shimmerwing Chimera
50% of 2 decks +50% synergy
Coretapper
50% of 2 decks +50% synergy
Relentless Rats
50% of 2 decks +50% synergy
Palinchron
50% of 2 decks +50% synergy
Ratcatcher
50% of 2 decks +49% synergy
Chainer, Dementia Master
50% of 2 decks +49% synergy
Marrow-Gnawer
50% of 2 decks +49% synergy
Sakashima's Protege
50% of 2 decks +49% synergy
Aphetto Alchemist
50% of 2 decks +49% synergy
Throat Slitter
50% of 2 decks +49% synergy
Overseer of the Damned
50% of 2 decks +49% synergy
Sepulchral Primordial
50% of 2 decks +48% synergy
K'rrik, Son of Yawgmoth
50% of 2 decks +48% synergy
Venser, Shaper Savant
50% of 2 decks +48% synergy
Ogre Slumlord
50% of 2 decks +48% synergy
Thrummingbird
50% of 2 decks +46% synergy
Crypt Ghast
50% of 2 decks +45% synergy
Opposition Agent
50% of 2 decks +43% synergy
Viscera Seer
50% of 2 decks +41% synergy
Instants
Serum Snare
100% of 1 decks +99% synergy
Prologue to Phyresis
100% of 1 decks +98% synergy
Dazzling Denial
100% of 1 decks +96% synergy
Mortify
100% of 1 decks +88% synergy
Void Rend
100% of 1 decks +85% synergy
Teferi's Protection
100% of 1 decks +80% synergy
Swords to Plowshares
100% of 1 decks +37% synergy
Hinder
50% of 2 decks +50% synergy
Tainted Strike
50% of 2 decks +48% synergy
Lim-Dûl's Vault
50% of 2 decks +46% synergy
Reality Shift
50% of 2 decks +41% synergy
Frantic Search
50% of 2 decks +38% synergy
Mana Drain
50% of 2 decks +35% synergy
Swan Song
50% of 2 decks +33% synergy
Vampiric Tutor
50% of 2 decks +32% synergy
Arcane Denial
50% of 2 decks +30% synergy
Negate
50% of 2 decks +27% synergy
Cyclonic Rift
50% of 2 decks +22% synergy
Counterspell
50% of 2 decks +7% synergy
Sorceries
Vat Emergence
100% of 1 decks +99% synergy
Sunfall
100% of 1 decks +98% synergy
Thirsting Roots
100% of 1 decks +98% synergy
Austere Command
100% of 1 decks +87% synergy
Damn
100% of 1 decks +83% synergy
Kodama's Reach
100% of 1 decks +68% synergy
Farseek
100% of 1 decks +66% synergy
Rampant Growth
100% of 1 decks +65% synergy
Cultivate
100% of 1 decks +54% synergy
Promise of Power
50% of 2 decks +50% synergy
Morbid Curiosity
50% of 2 decks +50% synergy
Expropriate
50% of 2 decks +48% synergy
Painful Truths
50% of 2 decks +47% synergy
Tezzeret's Gambit
50% of 2 decks +46% synergy
Read the Bones
50% of 2 decks +42% synergy
Toxic Deluge
50% of 2 decks +33% synergy
Demonic Tutor
50% of 2 decks +28% synergy
Utility Artifacts
Lux Cannon
50% of 2 decks +50% synergy
Magistrate's Scepter
50% of 2 decks +50% synergy
Thrumming Stone
50% of 2 decks +49% synergy
Nim Deathmantle
50% of 2 decks +49% synergy
The Chain Veil
50% of 2 decks +49% synergy
Contagion Engine
50% of 2 decks +49% synergy
Illusionist's Bracers
50% of 2 decks +49% synergy
Nevinyrral's Disk
50% of 2 decks +49% synergy
Contagion Clasp
50% of 2 decks +49% synergy
Lithoform Engine
50% of 2 decks +48% synergy
Manifold Key
50% of 2 decks +48% synergy
Thousand-Year Elixir
50% of 2 decks +48% synergy
Expedition Map
50% of 2 decks +47% synergy
Aetherflux Reservoir
50% of 2 decks +46% synergy
Panharmonicon
50% of 2 decks +46% synergy
Wayfarer's Bauble
50% of 2 decks +40% synergy
Lightning Greaves
50% of 2 decks +25% synergy
Swiftfoot Boots
50% of 2 decks +22% synergy
Enchantments
Awakened Awareness
100% of 1 decks +100% synergy
Norn's Decree
100% of 1 decks +98% synergy
Bred for the Hunt
100% of 1 decks +98% synergy
Communal Brewing
100% of 1 decks +96% synergy
Oath of Teferi
100% of 1 decks +96% synergy
Doubling Season
100% of 1 decks +91% synergy
Innkeeper's Talent
100% of 1 decks +91% synergy
Opposition
50% of 2 decks +49% synergy
Palace Siege
50% of 2 decks +49% synergy
Greed
50% of 2 decks +48% synergy
Dictate of Erebos
50% of 2 decks +46% synergy
Grave Pact
50% of 2 decks +46% synergy
Necropotence
50% of 2 decks +45% synergy
Phyrexian Arena
50% of 2 decks +35% synergy
Rhystic Study
50% of 2 decks +22% synergy
Planeswalkers
Teferi, Who Slows the Sunset
100% of 1 decks +98% synergy
Vraska, Betrayal's Sting
100% of 1 decks +96% synergy
Ashiok, Sculptor of Fears
50% of 2 decks +49% synergy
Jace, Unraveler of Secrets
50% of 2 decks +49% synergy
Tezzeret, Artifice Master
50% of 2 decks +49% synergy
Jace, the Mind Sculptor
50% of 2 decks +49% synergy
Liliana, Dreadhorde General
50% of 2 decks +46% synergy
Ashiok, Dream Render
50% of 2 decks +46% synergy
Narset, Parter of Veils
50% of 2 decks +45% synergy
Utility Lands
Calciform Pools
100% of 1 decks +99% synergy
Saltcrusted Steppe
100% of 1 decks +99% synergy
Drannith Ruins
100% of 1 decks +99% synergy
Reliquary Tower
100% of 2 decks +71% synergy
Bojuka Bog
100% of 2 decks +70% synergy
Magosi, the Waterveil
50% of 2 decks +50% synergy
Volrath's Stronghold
50% of 2 decks +49% synergy
Nesting Grounds
50% of 2 decks +49% synergy
Thespian's Stage
50% of 2 decks +47% synergy
Cabal Stronghold
50% of 2 decks +46% synergy
Nykthos, Shrine to Nyx
50% of 2 decks +44% synergy
Temple of the False God
50% of 2 decks +40% synergy
Urborg, Tomb of Yawgmoth
50% of 2 decks +40% synergy
Ancient Tomb
50% of 2 decks +39% synergy
Cabal Coffers
50% of 2 decks +39% synergy
Rogue's Passage
50% of 2 decks +31% synergy
Mana Artifacts
Golgari Signet
100% of 1 decks +87% synergy
Sol Ring
100% of 2 decks +16% synergy
Astral Cornucopia
50% of 2 decks +49% synergy
Mind Stone
50% of 2 decks +33% synergy
Fellwar Stone
50% of 2 decks +29% synergy
Talisman of Dominance
50% of 2 decks +19% synergy
Arcane Signet
50% of 2 decks -22% synergy
Lands
Raffine's Tower
100% of 1 decks +72% synergy
Zagoth Triome
100% of 1 decks +69% synergy
Indatha Triome
100% of 1 decks +69% synergy
Spara's Headquarters
100% of 1 decks +68% synergy
Temple Garden
100% of 1 decks +59% synergy
Godless Shrine
100% of 1 decks +59% synergy
Watery Grave
100% of 2 decks +59% synergy
Hallowed Fountain
100% of 1 decks +59% synergy
Breeding Pool
100% of 1 decks +59% synergy
Overgrown Tomb
100% of 1 decks +57% synergy
Command Tower
100% of 2 decks +26% synergy
Jwar Isle Refuge
50% of 2 decks +48% synergy
Spire of Industry
50% of 2 decks +47% synergy
Fetid Pools
50% of 2 decks +45% synergy
Dismal Backwater
50% of 2 decks +43% synergy
Clearwater Pathway
50% of 2 decks +40% synergy
Windswept Heath
50% of 2 decks +40% synergy
Tainted Isle
50% of 2 decks +39% synergy
Marsh Flats
50% of 2 decks +39% synergy
Verdant Catacombs
50% of 2 decks +39% synergy
Misty Rainforest
50% of 2 decks +38% synergy
Darkwater Catacombs
50% of 2 decks +35% synergy
Temple of Deceit
50% of 2 decks +34% synergy
Choked Estuary
50% of 2 decks +33% synergy
Dimir Aqueduct
50% of 2 decks +33% synergy
Underground River
50% of 2 decks +31% synergy
Drowned Catacomb
50% of 2 decks +25% synergy
Morphic Pool
50% of 2 decks +24% synergy
Sunken Hollow
50% of 2 decks +15% synergy
Exotic Orchard
50% of 2 decks +14% synergy