Holding priority, cast Naru Meha by paying its mana cost.
When Naru Meha enters, it triggers, copying Demonic Gifts, with the copy targeting Naru Meha.
Resolve the copy of Demonic Gifts.
Holding priority, activate Yahenni by sacrificing Naru Meha.
When Naru Meha dies, it triggers, returning it from your graveyard to the battlefield.
Repeat from step 3.
Resolve all Yahenni abilities from step 5.
This clever loop relies on Naru Meha, Master Wizard entering the battlefield to copy Demonic Gifts, targeting Naru Meha itself to ensure it always returns when sent to the graveyard. By using Yahenni, Undying Partisan as your dedicated sacrifice outlet, you can feed Naru Meha to the graveyard at will—triggering Demonic Gifts' delayed resurrection while simultaneously building up Yahenni's power with +1/+1 counters. Because Naru Meha generates a fresh copy of Demonic Gifts upon every single return, this recursive engine spins out infinite leaves-the-battlefield, entry, death, and sacrifice triggers on demand.