Activate Phyrexian Ghoul's ability by sacrificing Gravecrawler, giving Phyrexian Ghoul +2/+2 until end of turn.
Cast Gravecrawler from your graveyard by paying {0}.
Repeat.

Infinite death triggers

Infinite ETB

Infinite LTB

Infinitely large Phyrexian Ghoul until end of turn

Infinite sacrifice triggers

Infinite storm count

Gravecrawler

Rooftop Storm

Phyrexian Ghoul

Activate Phyrexian Ghoul by sacrificing Gravecrawler.
When Gravecrawler dies, Pitiless Plunderer triggers, creating a Treasure token.
Resolve the Phyrexian Ghoul ability, giving it +2/+2 until end of turn.
Activate the Treasure token by tapping and sacrificing it, adding {B}.
Cast Gravecrawler from your graveyard by paying {B}.
Repeat.

Infinitely large creature until end of turn

Pitiless Plunderer

Activate Liliana's third loyalty ability by removing three loyalty counters from it, allowing you to cast Zombie spells from your graveyard this turn.
Activate Phyrexian Ghoul by sacrificing Shambling Ghast.
When Shambing Ghast dies, it triggers, creating a Treasure token.
Resolve the Phyrexian Ghoul ability, giving it +2/+2 until end of turn.
Activate the Treasure token by tapping and sacrificing it, adding {B}.
Cast Shambling Ghast from your graveyard by paying {B}.
Repeat from step 2.

Liliana, Untouched by Death

Shambling Ghast

Activate Phyrexian Ghoul by sacrificing Nether Traitor.
Sek'Kuar triggers, creating a 3/1 Graveborn creature token creature with haste.
Resolve the Phyrexian Ghoul ability, giving it +2/+2 until end of turn.
Activate the Graveborn token using the ability from Cryptolith Rite by tapping it, adding {B}.
Activate Phyrexian Ghoul by sacrificing the Graveborn token.
Nether Traitor triggers, causing you to pay {B} to return it from your graveyard to the battlefield.
Resolve the Phyrexian Ghoul ability, giving it +2/+2 until end of turn.
Activate Nether Traitor using the ability from Cryptolith Rite by tapping it, adding one mana of any color.
Repeat.

Infinite colored mana

Sek'Kuar, Deathkeeper

Cryptolith Rite

Nether Traitor

Combos with "Phyrexian Ghoul"