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 Goblin Bombardment 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 Goblin Bombardment abilities, dealing that much damage to any target(s).
This infinite damage loop begins when you cast Fake Your Own Death to shield a creature, followed immediately by casting Naru Meha, Master Wizard to intercept the stack. Naru Meha's enter-the-battlefield trigger copies the instant, targeting Naru Meha itself so that it gains the resurrection effect. From there, you simply use Goblin Bombardment to sacrifice Naru Meha, triggering its return to the battlefield along with a fresh Treasure token to fund your spells while looping the process indefinitely.