Deathrender + Gravedigger + Eternal Witness + Ashnod's Altar

Deathrender
Gravedigger
Eternal Witness
Ashnod's Altar

Requires
Deathrender must be on the battlefield. Gravedigger must be in hand. Eternal Witness must be on the battlefield. Ashnod's Altar must be on the battlefield. Deathrender attached to Eternal Witness.
Steps
  1. Activate Ashnod's Altar by sacrificing Eternal Witness, adding .
  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. Activate Ashnod's Altar by sacrificing Gravedigger, adding .
  5. Gravedigger dies, triggering Deathrender, putting Eternal Witness from your hand onto the battlefield and attaching Deathrender to it.
  6. Eternal Witness enters the battlefield, returning Gravedigger from your graveyard to your hand.
  7. Repeat.
Results
Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Sivriss, Nightmare Speaker // Cloakwood Hermit
0.13% of 770 decks 1 decks
Colfenor, the Last Yew
0.10% of 1041 decks 1 decks
Jarad, Golgari Lich Lord
0.03% of 3813 decks 1 decks
New Cards
Season of Loss
100% of 1 decks +98% synergy
Stargaze
100% of 1 decks +99% synergy
Diresight
100% of 1 decks +98% synergy
Coiling Rebirth
100% of 1 decks +97% synergy
Creatures
Saffi Eriksdotter
100% of 1 decks +100% synergy
Knight of Autumn
100% of 1 decks +99% synergy
Good-Fortune Unicorn
100% of 1 decks +99% synergy
Athreos, God of Passage
100% of 1 decks +99% synergy
Luminous Broodmoth
100% of 1 decks +99% synergy
Teysa Karlov
100% of 1 decks +99% synergy
Corpse Knight
100% of 1 decks +99% synergy
Suture Priest
100% of 1 decks +98% synergy
Cruel Celebrant
100% of 1 decks +98% synergy
Elas il-Kor, Sadistic Pilgrim
100% of 1 decks +97% synergy
Avacyn's Pilgrim
100% of 1 decks +97% synergy
Esper Sentinel
100% of 1 decks +90% synergy
Mindless Automaton
67% of 3 decks +66% synergy
Mortivore
67% of 3 decks +66% synergy
Tormod, the Desecrator
67% of 3 decks +66% synergy
Woodfall Primus
67% of 3 decks +66% synergy
Meren of Clan Nel Toth
67% of 3 decks +66% synergy
Brawn
67% of 3 decks +66% synergy
Wood Elves
67% of 3 decks +63% synergy
Elvish Mystic
67% of 3 decks +58% synergy
Souls of the Lost
50% of 2 decks +50% synergy
The Mycotyrant
50% of 2 decks +50% synergy
Yargle and Multani
50% of 2 decks +49% synergy
Hag Hedge-Mage
33% of 3 decks +33% synergy
Liege of the Hollows
33% of 3 decks +33% synergy
Pit Keeper
33% of 3 decks +33% synergy
Glissa, the Traitor
33% of 3 decks +33% synergy
Haruspex
33% of 3 decks +33% synergy
Melira, Sylvok Outcast
33% of 3 decks +33% synergy
Treasure Keeper
33% of 3 decks +33% synergy
Savra, Queen of the Golgari
33% of 3 decks +33% synergy
Priest of Gix
33% of 3 decks +33% synergy
Reyhan, Last of the Abzan
33% of 3 decks +33% synergy
Cryptic Trilobite
33% of 3 decks +33% synergy
Wall of Blood
33% of 3 decks +33% synergy
Golgari Findbroker
33% of 3 decks +33% synergy
Creakwood Liege
33% of 3 decks +33% synergy
Erinis, Gloom Stalker
33% of 3 decks +33% synergy
Lord of Extinction
33% of 3 decks +33% synergy
Cavalier of Night
33% of 3 decks +33% synergy
Endless One
33% of 3 decks +33% synergy
Genesis
33% of 3 decks +33% synergy
Body Launderer
33% of 3 decks +33% synergy
Izoni, Thousand-Eyed
33% of 3 decks +33% synergy
Skirge Familiar
33% of 3 decks +33% synergy
Golgari Thug
33% of 3 decks +33% synergy
Ravenous Squirrel
33% of 3 decks +33% synergy
Skullwinder
33% of 3 decks +33% synergy
Smothering Abomination
33% of 3 decks +33% synergy
Stinkweed Imp
33% of 3 decks +33% synergy
Instants
Despark
100% of 1 decks +96% synergy
Swords to Plowshares
100% of 1 decks +71% synergy
Blinding Fog
33% of 3 decks +33% synergy
Hatred
33% of 3 decks +33% synergy
Grisly Salvage
33% of 3 decks +32% synergy
Fog
33% of 3 decks +32% synergy
Village Rites
33% of 3 decks +28% synergy
Assassin's Trophy
33% of 3 decks +27% synergy
Sorceries
Dread Return
33% of 3 decks +31% synergy
Buried Alive
33% of 3 decks +31% synergy
Living Death
33% of 3 decks +31% synergy
Victimize
33% of 3 decks +27% synergy
Reanimate
33% of 3 decks +26% synergy
Utility Artifacts
Altar of Dementia
67% of 3 decks +64% synergy
Skullclamp
67% of 3 decks +54% synergy
Vat of Rebirth
50% of 2 decks +49% synergy
Conduit of Worlds
50% of 2 decks +47% synergy
Inscribed Tablet
33% of 3 decks +33% synergy
Executioner's Capsule
33% of 3 decks +33% synergy
Chitterspitter
33% of 3 decks +33% synergy
Blasting Station
33% of 3 decks +33% synergy
Thornbite Staff
33% of 3 decks +33% synergy
Altar of the Brood
33% of 3 decks +32% synergy
Moonsilver Key
33% of 3 decks +32% synergy
Phyrexian Altar
33% of 3 decks +29% synergy
Wayfarer's Bauble
33% of 3 decks +23% synergy
Lightning Greaves
33% of 3 decks +8% synergy
Swiftfoot Boots
33% of 3 decks +5% synergy
Enchantments
Abzan Ascendancy
100% of 1 decks +100% synergy
Glorious Anthem
100% of 1 decks +100% synergy
Cathars' Crusade
100% of 1 decks +97% synergy
Ripples of Undeath
100% of 1 decks +96% synergy
Dictate of Erebos
67% of 3 decks +65% synergy
Grave Pact
67% of 3 decks +64% synergy
Chalk Outline
50% of 2 decks +50% synergy
Insidious Roots
50% of 2 decks +48% synergy
Strands of Night
33% of 3 decks +33% synergy
One with the Kami
33% of 3 decks +33% synergy
Earthcraft
33% of 3 decks +33% synergy
Fecundity
33% of 3 decks +33% synergy
Squirrel Nest
33% of 3 decks +33% synergy
Journey to Eternity
33% of 3 decks +33% synergy
Tortured Existence
33% of 3 decks +33% synergy
Oversold Cemetery
33% of 3 decks +32% synergy
Necromancy
33% of 3 decks +32% synergy
Cryptolith Rite
33% of 3 decks +32% synergy
Greater Good
33% of 3 decks +31% synergy
Black Market
33% of 3 decks +31% synergy
Necropotence
33% of 3 decks +31% synergy
Guardian Project
33% of 3 decks +29% synergy
Doubling Season
33% of 3 decks +29% synergy
Animate Dead
33% of 3 decks +29% synergy
Phyrexian Arena
33% of 3 decks +26% synergy
Planeswalkers
Liliana, the Last Hope
33% of 3 decks +33% synergy
Vraska, Golgari Queen
33% of 3 decks +33% synergy
Utility Lands
Gavony Township
100% of 1 decks +98% synergy
Svogthos, the Restless Tomb
33% of 3 decks +33% synergy
Hissing Quagmire
33% of 3 decks +33% synergy
Volrath's Stronghold
33% of 3 decks +33% synergy
Tranquil Thicket
33% of 3 decks +32% synergy
Maze of Ith
33% of 3 decks +31% synergy
Castle Locthwain
33% of 3 decks +30% synergy
Nykthos, Shrine to Nyx
33% of 3 decks +28% synergy
Urborg, Tomb of Yawgmoth
33% of 3 decks +23% synergy
Reliquary Tower
33% of 3 decks +4% synergy
Mana Artifacts
Arcane Signet
67% of 3 decks -5% synergy
Sol Ring
67% of 3 decks -18% synergy
Talisman of Resilience
33% of 3 decks +31% synergy
Golgari Signet
33% of 3 decks +31% synergy
Lands
Sandsteppe Citadel
100% of 1 decks +97% synergy
Temple of Plenty
100% of 1 decks +97% synergy
Underground Mortuary
100% of 2 decks +96% synergy
Temple of Silence
100% of 1 decks +96% synergy
Woodland Cemetery
67% of 3 decks +61% synergy
Overgrown Tomb
67% of 3 decks +57% synergy
Evolving Wilds
67% of 3 decks +46% synergy
Command Tower
67% of 3 decks -7% synergy
Woodland Chasm
33% of 3 decks +32% synergy
Haunted Mire
33% of 3 decks +32% synergy
Jungle Hollow
33% of 3 decks +31% synergy
Riveteers Overlook
33% of 3 decks +31% synergy
Twilight Mire
33% of 3 decks +31% synergy
Necroblossom Snarl
33% of 3 decks +31% synergy
Tainted Wood
33% of 3 decks +31% synergy
Bayou
33% of 3 decks +30% synergy
Deathcap Glade
33% of 3 decks +30% synergy
Temple of Malady
33% of 3 decks +30% synergy
Golgari Rot Farm
33% of 3 decks +30% synergy
Llanowar Wastes
33% of 3 decks +28% synergy
Undergrowth Stadium
33% of 3 decks +28% synergy
Verdant Catacombs
33% of 3 decks +22% synergy