Cast Fake Your Own Death by paying 1, targeting any creature.
Holding priority, cast Naru Meha by paying 2.
When Naru Meha enters the battlefield, it triggers, copying Fake Your Own Death, targeting Naru Meha.
Resolve the copy of Fake Your Own Death.
Holding priority, activate Altar of Dementia by sacrificing Naru Meha.
When Naru Meha dies, it triggers, returning itself from your graveyard to the battlefield and creating a Treasure token.
Repeat from step 3.
Resolve all Altar of Dementia abilities, causing any number of players to mill that many cards.
This clever loop transforms Naru Meha, Master Wizard into an endless recursion engine by taking advantage of her own entry trigger. When Naru Meha enters the battlefield, she copies the previously cast Fake Your Own Death to protect herself, ensuring that whenever Altar of Dementia sacrifices her to mill an opponent, she immediately returns to the battlefield while leaving behind a valuable Treasure token. Because that new entry triggers yet another copy of Fake Your Own Death, you can repeat this cycle infinitely to mill out any number of players while generating an unlimited supply of mana and artifacts.