Cast Entering by paying its mana cost, targeting any applicable target.
Holding priority, cast Naru Meha by paying its mana cost.
When Naru Meha enters, it triggers, targeting Entering.
Holding priority, activate Ashnod's Altar by sacrificing Naru Meha.
Resolve the Naru Meha trigger, copying Entering, with the copy targeting Naru Meha
Resolve the Entering copy, returning Naru Meha from your graveyard to the battlefield.
Repeat from step 3.
This brilliant little loop turns the Entering half of Breaking // Entering into a continuous recursive engine by using Naru Meha, Master Wizard to endlessly copy the spell from the stack. Whenever Naru Meha enters the battlefield, her trigger targets the original spell, but sacrificing her to Ashnod's Altar along the way ensures she is safely in the graveyard to be reanimated by the very copy she just created. As this cycle repeats, Ashnod's Altar converts the sacrificial offering of our reanimated Wizard into an endless reservoir of colorless mana while generating infinite triggers of all kinds.