Deathrender + Gravedigger + Eternal Witness + Altar of Dementia

Deathrender
Gravedigger
Eternal Witness
Altar of Dementia

Requires
Deathrender must be on the battlefield. Gravedigger must be in hand. Eternal Witness must be on the battlefield. Altar of Dementia must be on the battlefield. Deathrender attached to Eternal Witness.
Steps
  1. Activate Altar of Dementia 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 Altar of Dementia ability from step 1, causing target player to mill cards equal to Eternal Witness' power.
  5. Activate Altar of Dementia 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 Altar of Dementia ability from step 5, causing target player to mill cards equal to Gravedigger's power.
  9. Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mill. Infinite sacrifice triggers. Infinite self-mill.

Jarad, Golgari Lich Lord
0.05% of 3925 decks 2 decks
Colfenor, the Last Yew
0.10% of 1029 decks 1 decks
Creatures
Souls of the Lost
100% of 1 decks +99% synergy
Tormod, the Desecrator
100% of 3 decks +99% synergy
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
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
Priest of Gix
67% of 3 decks +66% synergy
Wall of Blood
67% of 3 decks +66% synergy
Golgari Findbroker
67% of 3 decks +65% synergy
Woodfall Primus
67% of 3 decks +65% synergy
Stinkweed Imp
67% of 3 decks +65% synergy
Golgari Grave-Troll
67% of 3 decks +65% synergy
Yavimaya Elder
67% of 3 decks +65% synergy
Protean Hulk
67% of 3 decks +65% synergy
Lord of Extinction
67% of 3 decks +65% synergy
Satyr Wayfinder
67% of 3 decks +65% synergy
Razaketh, the Foulblooded
67% of 3 decks +65% synergy
Meren of Clan Nel Toth
67% of 3 decks +64% synergy
World Shaper
67% of 3 decks +64% synergy
Sheoldred, Whispering One
67% of 3 decks +62% synergy
Carrion Feeder
67% of 3 decks +62% synergy
Pitiless Plunderer
67% of 3 decks +59% synergy
Avenger of Zendikar
67% of 3 decks +57% synergy
Elvish Mystic
67% of 3 decks +49% synergy
Sakura-Tribe Elder
67% of 3 decks +48% synergy
Haruspex
50% of 2 decks +50% synergy
Haywire Mite
50% of 2 decks +46% synergy
Phyrexian Devourer
33% of 3 decks +33% synergy
Cryptic Trilobite
33% of 3 decks +33% synergy
Mindless Automaton
33% of 3 decks +33% synergy
Melira, Sylvok Outcast
33% of 3 decks +33% synergy
Endless One
33% of 3 decks +33% synergy
Mortivore
33% of 3 decks +33% synergy
Relentless Dead
33% of 3 decks +33% synergy
Hangarback Walker
33% of 3 decks +32% synergy
Skirge Familiar
33% of 3 decks +32% synergy
Endrek Sahr, Master Breeder
33% of 3 decks +32% synergy
Defiler of Flesh
33% of 3 decks +32% synergy
Reyhan, Last of the Abzan
33% of 3 decks +32% synergy
Golgari Thug
33% of 3 decks +32% synergy
Stonecoil Serpent
33% of 3 decks +32% synergy
Instants
Despark
100% of 1 decks +85% synergy
Swords to Plowshares
100% of 1 decks +37% synergy
Hatred
67% of 3 decks +66% synergy
Blinding Fog
33% of 3 decks +33% synergy
Fog
33% of 3 decks +30% synergy
Grisly Salvage
33% of 3 decks +28% synergy
Harrow
33% of 3 decks +24% synergy
Village Rites
33% of 3 decks +23% synergy
Vampiric Tutor
33% of 3 decks +15% synergy
Assassin's Trophy
33% of 3 decks +3% synergy
Sorceries
Stargaze
100% of 1 decks +99% synergy
Season of Loss
100% of 1 decks +98% synergy
Diresight
100% of 1 decks +97% synergy
Coiling Rebirth
100% of 1 decks +97% synergy
Victimize
67% of 3 decks +55% synergy
Far Wanderings
33% of 3 decks +32% synergy
Jarad's Orders
33% of 3 decks +31% synergy
Explosive Vegetation
33% of 3 decks +30% synergy
Splendid Reclamation
33% of 3 decks +30% synergy
Life from the Loam
33% of 3 decks +30% synergy
Dread Return
33% of 3 decks +28% synergy
Buried Alive
33% of 3 decks +28% synergy
Reanimate
33% of 3 decks +18% synergy
Kodama's Reach
33% of 3 decks +2% synergy
Rampant Growth
33% of 3 decks -1% synergy
Cultivate
33% of 3 decks -13% synergy
Utility Artifacts
Ashnod's Altar
100% of 3 decks +93% synergy
Skullclamp
100% of 3 decks +88% synergy
Lightning Greaves
67% of 3 decks +41% synergy
Swiftfoot Boots
67% of 3 decks +39% synergy
Blasting Station
33% of 3 decks +33% synergy
Altar of the Brood
33% of 3 decks +32% synergy
Crucible of Worlds
33% of 3 decks +31% synergy
Aetherflux Reservoir
33% of 3 decks +30% synergy
Phyrexian Altar
33% of 3 decks +29% 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
Ripples of Undeath
100% of 1 decks +94% synergy
Dictate of Erebos
67% of 3 decks +63% synergy
Phyrexian Arena
67% of 3 decks +52% synergy
One with the Kami
33% of 3 decks +33% synergy
Underworld Connections
33% of 3 decks +32% synergy
Cryptolith Rite
33% of 3 decks +30% synergy
Phyrexian Reclamation
33% of 3 decks +30% synergy
Grave Pact
33% of 3 decks +29% synergy
Black Market
33% of 3 decks +29% synergy
Necropotence
33% of 3 decks +28% synergy
Guardian Project
33% of 3 decks +25% synergy
Doubling Season
33% of 3 decks +24% synergy
Animate Dead
33% of 3 decks +24% synergy
Utility Lands
Gavony Township
100% of 1 decks +91% synergy
Tranquil Thicket
67% of 3 decks +63% synergy
Urborg, Tomb of Yawgmoth
67% of 3 decks +57% synergy
Reliquary Tower
67% of 3 decks +37% synergy
Svogthos, the Restless Tomb
33% of 3 decks +33% synergy
Polluted Mire
33% of 3 decks +32% synergy
Dark Depths
33% of 3 decks +32% synergy
Hissing Quagmire
33% of 3 decks +32% synergy
Field of Ruin
33% of 3 decks +31% synergy
Thespian's Stage
33% of 3 decks +31% synergy
High Market
33% of 3 decks +30% synergy
Barren Moor
33% of 3 decks +30% synergy
Grim Backwoods
33% of 3 decks +29% synergy
Dryad Arbor
33% of 3 decks +29% synergy
Mortuary Mire
33% of 3 decks +28% synergy
Buried Ruin
33% of 3 decks +28% synergy
Castle Locthwain
33% of 3 decks +28% synergy
Nykthos, Shrine to Nyx
33% of 3 decks +28% synergy
Phyrexian Tower
33% of 3 decks +25% synergy
Bojuka Bog
33% of 3 decks +3% synergy
Mana Artifacts
Talisman of Resilience
67% of 3 decks +55% synergy
Golgari Signet
67% of 3 decks +54% synergy
Sol Ring
67% of 3 decks -18% synergy
Golgari Locket
33% of 3 decks +33% synergy
Arcane Signet
33% of 3 decks -39% synergy
Lands
Temple of Plenty
100% of 1 decks +87% synergy
Underground Mortuary
100% of 1 decks +84% synergy
Temple of Silence
100% of 1 decks +82% synergy
Sandsteppe Citadel
100% of 1 decks +74% synergy
Woodland Cemetery
100% of 3 decks +72% synergy
Command Tower
100% of 3 decks +26% synergy
Jungle Hollow
67% of 3 decks +58% synergy
Twilight Mire
67% of 3 decks +57% synergy
Tainted Wood
67% of 3 decks +54% synergy
Temple of Malady
67% of 3 decks +50% synergy
Golgari Rot Farm
67% of 3 decks +49% synergy
Evolving Wilds
67% of 3 decks +46% synergy
Llanowar Wastes
67% of 3 decks +41% synergy
Overgrown Tomb
67% of 3 decks +24% synergy
Ash Barrens
33% of 3 decks +29% synergy
Verdant Catacombs
33% of 3 decks +22% synergy
Necroblossom Snarl
33% of 3 decks +22% synergy
Deathcap Glade
33% of 3 decks +20% synergy
Myriad Landscape
33% of 3 decks +14% synergy
Undergrowth Stadium
33% of 3 decks +7% synergy