Alesha, Who Smiles at Death + Crystalline Crawler + Aggravated Assault + Arcbound Overseer + Krark-Clan Ironworks

Alesha, Who Smiles at Death

Crystalline Crawler

Aggravated Assault

Arcbound Overseer

Krark-Clan Ironworks

How it works

1. Activate Crystalline Crawler's second ability by tapping it, putting a +1/+1 counter on it.
2. Activate Krark-Clan Ironworks by sacrificing Arcbound Overseer, adding CC.
3. When Arcbound Overseer dies, it triggers, putting its +1/+1 counters on Crystalline Crawler.
4. Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding 1.
5. 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.
6. Declare Alesha as an attacker, triggering its ability, targeting Arcbound Overseer.
7. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding W/BW/B.
8. 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.
9. Repeat.

This intricate loop turns a continuous cycle of combat and artifact sacrifice into boundless resources, anchored by Crystalline Crawler converting its own growth into the precise colors of mana you need. Krark-Clan Ironworks provides the necessary sacrifice outlet for Arcbound Overseer, whose modular ability shifts its massive stack of counters right back onto Crystalline Crawler to fuel further activations. With Aggravated Assault granting an endless stream of extra combat steps, Alesha, Who Smiles at Death can continually march back into battle and resurrect Arcbound Overseer from the graveyard for free.