Alesha, Who Smiles at Death + Crystalline Crawler + Aggravated Assault + Arcbound Overseer + Goblin Bombardment

Alesha, Who Smiles at Death

Crystalline Crawler

Aggravated Assault

Arcbound Overseer

Goblin Bombardment

How it works

1. Activate Crystalline Crawler's second ability by tapping it, putting a +1/+1 counter on it.
2. Activate Goblin Bombardment by sacrificing Arcbound Overseer.
3. When Arcbound Overseer dies, it triggers, putting its +1/+1 counters on Crystalline Crawler.
4. Resolve the Goblin Bombardment ability.
5. Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding 3.
6. Activate Aggravated Assault by paying 3, causing you to untap all creatures you control and to get an additional combat and main phase after this one.
7. Declare Alesha as an attacker, triggering its ability, targeting Arcbound Overseer.
8. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding W/BW/B.
9. Resolve the Alesha trigger, causing you to pay W/BW/B to return Arcbound Overseer from your graveyard to the battlefield tapped and attacking with six +1/+1 counters on it due to its modular ability.
10. Repeat.

This explosive engine transforms Crystalline Crawler into a mana-generating battery that funds infinite combat phases through Aggravated Assault. By utilizing Goblin Bombardment to sacrifice Arcbound Overseer, you trigger its modular ability to pile counters back onto the Crawler, which then feeds the mana needed to keep untapping your board. Meanwhile, Alesha, Who Smiles at Death continuously loops the Overseer right back into the fray from your graveyard during each new combat step, ensuring your mechanical loop never runs out of fuel.