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 Altar of Dementia by sacrificing a Necron Warrior.
When the Necron Warrior dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the Necron Warrior's power.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.
This intricate loop thrives on an engine of recycling and sacrifice, perfectly orchestrated by Tortured Existence to continuously cycle creature cards between your hand and graveyard for a single black mana. Pitiless Plunderer acts as your financial backbone, turning every sacrificial death into a newly minted Treasure token to fund the ongoing black mana requirements. Meanwhile, Imotekh the Stormlord observes these graveyard movements—specifically whenever artifact cards leave your graveyard—and floods the board with a pair of 2/2 Necron Warriors to replenish your sacrificial fodder. Finally, Altar of Dementia puts those generated tokens to work by milling your opponent's library to dust every time they are sacrificed to the altar, securing your victory through an unstoppable cascade of artifact and creature triggers.