Activate Tortured Existence by paying and discarding an artifact creature card, returning another artifact creature card from your graveyard to your hand.
Imotekh triggers, creating two 2/2 Necron Warrior artifact creature tokens.
Activate Viscera Seer by sacrificing a Necron Warrior.
When the Necron Warrior dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
Resolve the Viscera Seer ability, causing you to scry 1.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.
This recursive engine transforms a simple graveyard loop into an endless factory of resources by using Tortured Existence to continuously swap artifact creature cards between your hand and graveyard for a single mana. Every time an artifact card leaves your graveyard, Imotekh the Stormlord steps in to reward you with two 2/2 Necron Warrior tokens, which you can immediately feed to Viscera Seer to sculpt your draws and trigger Pitiless Plunderer. The resulting death of each warrior creates a Treasure token that, when sacrificed, pays for the exact black mana needed to fuel Tortured Existence all over again.