Cast Prison Break either from your hand by paying 4 or from your graveyard for its mayhem cost by paying 3, targeting any applicable target.
Holding priority, cast Naru Meha by paying its mana cost.
When Naru Meha enters, it triggers, targeting Prison Break.
Holding priority, activate Altar of Dementia by sacrificing Naru Meha.
Resolve the Naru Meha trigger, copying Prison Break, with the copy targeting Naru Meha
Resolve the Prison Break copy, returning Naru Meha from your graveyard to the battlefield.
Repeat from step 3.
This clever loop harnesses a recursive spell-copying engine to grind through an opponent's entire library. By casting Prison Break to return a creature, you set the stage for Naru Meha, Master Wizard to enter the battlefield and copy that very same spell, targeting Naru Meha itself. Before the copy resolves, Altar of Dementia lets you cheerfully sacrifice Naru Meha to mill cards based on its power, sending it right back to the graveyard to be successfully retrieved by the copied Prison Break. Repeating this cycle yields an endless stream of sacrifice and entry triggers that instantly mills your opponents out of the game.