Quandrix Command + Crystalline Crawler + Naru Meha, Master Wizard + Loading Zone

Quandrix Command

Crystalline Crawler

Naru Meha, Master Wizard

Loading Zone

How it works

1. Cast Quandrix Command by paying its mana cost, choosing its first and third modes.
2. Holding priority, cast Naru Meha by paying its mana cost.
3. When Naru Meha enters, it triggers, copying Quandrix Command, with the copy's first mode targeting Naru Meha and the copy's third mode targeting Crystalline Crawler.
4. Resolve the copy of Quandrix Command, returning Naru Meha from the battlefield to your hand and putting four +1/+1 counters on Crystalline Crawler due to Loading Zone.
5. Holding priority, activate Crystalline Crawler three times by removing four +1/+1 counters from it, adding 2.
6. Repeat from step 2.

This fascinating loop revolves around a self-sustaining spell-copying engine, fueled entirely by the mana-generating versatility of Crystalline Crawler. When you cast Quandrix Command, Naru Meha, Master Wizard steps in with flash to copy it upon entering the battlefield, bouncing herself back to your hand while the original spell remains untouched. Meanwhile, Loading Zone supercharges the engine by doubling the +1/+1 counters placed on Crystalline Crawler, ensuring that removing those counters yields more than enough mana to recast Naru Meha and repeat the process indefinitely.