Activate Razorlash Transmogrant by paying {B}{B}, returning it from your graveyard to the battlefield.
Activate Phyrexian Altar by sacrificing Razorlash Transmogrant, adding {B}.
When Razorlash Transmogrant dies, Pitiless Plunderer triggers, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Repeat.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Razorlash Transmogrant

Pitiless Plunderer

Phyrexian Altar

Activate Razorlash Transmogrant by paying {B}{B}, returning it from your graveyard to the battlefield.
When Razorlash Transmogrant enters the battlefield, Necroduality triggers, creating a token copy of Razorlash Transmogrant.
Activate Phyrexian Altar twice by sacrificing both Razorlash Transmogrants, adding {B}{B}.
Repeat.

Necroduality

Activate Liliana's third loyalty ability by removing three loyalty counters from it, allowing you to cast Zombie spells from your graveyard this turn.
Cast Razorlash Transmogrant from your graveyard by paying {2}.
Activate Ashnod's Altar by sacrificing Razorlash Transmogrant, adding {C}{C}.
Repeat from step 2.

Infinite storm count

Liliana, Untouched by Death

Ashnod's Altar

Activate Liquimetal Torque by tapping it, causing Jan Jansen to become an artifact until end of turn.
Activate Jan Jansen's first ability by tapping it and sacrificing Razorlash Transmogrant.
When Razorlash Transmogrant dies, Dross Scorpion triggers, untapping Jan Jansen.
Resolve the Jan Jansen ability, creating two Treasure tokens.
Activate the Treasures by tapping and sacrificing them, adding {B}{B}.
Activate Razorlash Transmogrant by paying {B}{B}, putting it from your graveyard onto the battlefield.
Repeat from step 2.

Jan Jansen, Chaos Crafter

Dross Scorpion

Liquimetal Torque

Activate Jan Jansen's first ability by tapping it and sacrificing Razorlash Transmogrant.
When Razorlash Transmogrant dies, Jan Jansen triggers, untapping Jan Jansen.
Resolve the Jan Jansen ability, creating two Treasure tokens.
Activate the Treasures by tapping and sacrificing them, adding {B}{B}.
Activate Razorlash Transmogrant by paying {B}{B}, putting it from your graveyard onto the battlefield.
Repeat from step 2.

Combos with "Razorlash Transmogrant"