Deathrender + Gravedigger + Eternal Witness + Viscera Seer

Deathrender
Gravedigger
Eternal Witness
Viscera Seer

Requires
Deathrender must be on the battlefield. Gravedigger must be in hand. Eternal Witness must be on the battlefield. Viscera Seer must be on the battlefield. Deathrender attached to Eternal Witness.
Steps
  1. Activate Viscera Seer by sacrificing Eternal Witness.
  2. Eternal Witness dies, triggering Deathrender, putting Gravedigger from your hand onto the battlefield and attaching Deathrender to it.
  3. Gravedigger enters the battlefield, returning Eternal Witness from your graveyard to your hand.
  4. Resolve the Viscera Seer ability from step 1, causing you to scry 1.
  5. Activate Viscera Seer by sacrificing Gravedigger.
  6. Gravedigger dies, triggering Deathrender, putting Eternal Witness from your hand onto the battlefield and attaching Deathrender to it.
  7. Eternal Witness enters the battlefield, returning Gravedigger from your graveyard to your hand.
  8. Resolve the Viscera Seer ability from step 5, causing you to scry 1.
  9. Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite scry 1.

Varolz, the Scar-Striped
0.08% of 1323 decks 1 decks
Colfenor, the Last Yew
0.10% of 1029 decks 1 decks
Creatures
Saffi Eriksdotter
100% of 1 decks +98% synergy
Luminous Broodmoth
100% of 1 decks +98% synergy
Knight of Autumn
100% of 1 decks +98% synergy
Walking Ballista
100% of 2 decks +97% synergy
Good-Fortune Unicorn
100% of 1 decks +97% synergy
Athreos, God of Passage
100% of 1 decks +97% synergy
Yargle and Multani
100% of 1 decks +97% synergy
Suture Priest
100% of 1 decks +97% synergy
Teysa Karlov
100% of 1 decks +95% synergy
Corpse Knight
100% of 1 decks +94% synergy
Cruel Celebrant
100% of 1 decks +92% synergy
Elas il-Kor, Sadistic Pilgrim
100% of 1 decks +89% synergy
Avacyn's Pilgrim
100% of 1 decks +85% synergy
Esper Sentinel
100% of 1 decks +80% synergy
Nyxathid
50% of 2 decks +50% synergy
Permeating Mass
50% of 2 decks +50% synergy
Old-Growth Dryads
50% of 2 decks +50% synergy
Force of Savagery
50% of 2 decks +50% synergy
Phyrexian Dreadnought
50% of 2 decks +50% synergy
Eater of Days
50% of 2 decks +50% synergy
Groundbreaker
50% of 2 decks +50% synergy
Lupine Prototype
50% of 2 decks +50% synergy
Death's Shadow
50% of 2 decks +50% synergy
Myr Superion
50% of 2 decks +50% synergy
Maralen of the Mornsong
50% of 2 decks +50% synergy
Vault Skirge
50% of 2 decks +50% synergy
Phyrexian Soulgorger
50% of 2 decks +50% synergy
Haruspex
50% of 2 decks +50% synergy
Crystalline Crawler
50% of 2 decks +50% synergy
Putrid Imp
50% of 2 decks +50% synergy
Melira, Sylvok Outcast
50% of 2 decks +50% synergy
Endless One
50% of 2 decks +50% synergy
Traxos, Scourge of Kroog
50% of 2 decks +50% synergy
Bloodspore Thrinax
50% of 2 decks +50% synergy
Undergrowth Champion
50% of 2 decks +50% synergy
Grim Flayer
50% of 2 decks +49% synergy
Rotting Regisaur
50% of 2 decks +49% synergy
Viridian Joiner
50% of 2 decks +49% synergy
Acererak the Archlich
50% of 2 decks +49% synergy
Deathcap Cultivator
50% of 2 decks +49% synergy
Hangarback Walker
50% of 2 decks +49% synergy
Pir, Imaginative Rascal
50% of 2 decks +49% synergy
Reyhan, Last of the Abzan
50% of 2 decks +49% synergy
Tormod, the Desecrator
50% of 2 decks +49% synergy
Stonecoil Serpent
50% of 2 decks +49% synergy
Steelbane Hydra
50% of 2 decks +48% synergy
Mycoloth
50% of 2 decks +48% synergy
Ornithopter
50% of 2 decks +48% synergy
Pawn of Ulamog
50% of 2 decks +48% synergy
Mikaeus, the Unhallowed
50% of 2 decks +47% synergy
Instants
Despark
100% of 1 decks +85% synergy
Swords to Plowshares
100% of 1 decks +37% synergy
Natural Selection
50% of 2 decks +50% synergy
Blinding Fog
50% of 2 decks +50% synergy
Astarion's Thirst
50% of 2 decks +49% synergy
Fog
50% of 2 decks +47% synergy
Murder
50% of 2 decks +47% synergy
Grisly Salvage
50% of 2 decks +45% synergy
Entomb
50% of 2 decks +43% synergy
Village Rites
50% of 2 decks +40% synergy
Vampiric Tutor
50% of 2 decks +32% synergy
Dark Ritual
50% of 2 decks +28% synergy
Assassin's Trophy
50% of 2 decks +20% synergy
Sorceries
Driven // Despair
50% of 2 decks +50% synergy
Traverse the Ulvenwald
50% of 2 decks +50% synergy
Mastermind's Acquisition
50% of 2 decks +50% synergy
Gaea's Blessing
50% of 2 decks +49% synergy
Jarad's Orders
50% of 2 decks +48% synergy
Demonic Tutor
50% of 2 decks +28% synergy
Utility Artifacts
Lightning Greaves
100% of 2 decks +75% synergy
Cauldron of Souls
50% of 2 decks +49% synergy
Blasting Station
50% of 2 decks +49% synergy
Umbral Mantle
50% of 2 decks +49% synergy
Altar of the Brood
50% of 2 decks +49% synergy
Contagion Clasp
50% of 2 decks +49% synergy
Crucible of Worlds
50% of 2 decks +47% synergy
Altar of Dementia
50% of 2 decks +47% synergy
The Ozolith
50% of 2 decks +46% synergy
Phyrexian Altar
50% of 2 decks +46% synergy
Ashnod's Altar
50% of 2 decks +43% synergy
Skullclamp
50% of 2 decks +38% synergy
Swiftfoot Boots
50% of 2 decks +22% synergy
Enchantments
Glorious Anthem
100% of 1 decks +99% synergy
Abzan Ascendancy
100% of 1 decks +98% synergy
Cathars' Crusade
100% of 1 decks +94% synergy
Cream of the Crop
50% of 2 decks +50% synergy
Aluren
50% of 2 decks +50% synergy
Cryptolith Rite
50% of 2 decks +47% synergy
Dictate of Erebos
50% of 2 decks +46% synergy
Guardian Project
50% of 2 decks +41% synergy
Hardened Scales
50% of 2 decks +41% synergy
Doubling Season
50% of 2 decks +41% synergy
Planeswalkers
Garruk, Cursed Huntsman
50% of 2 decks +48% synergy
Utility Lands
Gavony Township
100% of 1 decks +91% synergy
Detection Tower
50% of 2 decks +49% synergy
Wasteland
50% of 2 decks +49% synergy
Strip Mine
50% of 2 decks +47% synergy
Field of the Dead
50% of 2 decks +47% synergy
Scavenger Grounds
50% of 2 decks +47% synergy
Barren Moor
50% of 2 decks +46% synergy
Shizo, Death's Storehouse
50% of 2 decks +45% synergy
Urborg, Tomb of Yawgmoth
50% of 2 decks +40% synergy
Rogue's Passage
50% of 2 decks +30% synergy
Reliquary Tower
50% of 2 decks +20% synergy
Bojuka Bog
50% of 2 decks +20% synergy
Mana Artifacts
Arcane Signet
50% of 2 decks -22% synergy
Sol Ring
50% of 2 decks -34% synergy
Lands
Temple of Plenty
100% of 1 decks +87% synergy
Temple of Silence
100% of 1 decks +82% synergy
Evolving Wilds
100% of 2 decks +79% synergy
Sandsteppe Citadel
100% of 1 decks +74% synergy
Woodland Cemetery
100% of 2 decks +72% synergy
Command Tower
100% of 2 decks +26% synergy
Fabled Passage
50% of 2 decks +41% 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
Bayou
50% of 2 decks +36% synergy
Temple of Malady
50% of 2 decks +34% synergy
Golgari Rot Farm
50% of 2 decks +32% synergy
Llanowar Wastes
50% of 2 decks +24% synergy
Overgrown Tomb
50% of 2 decks +8% synergy