Alesha, Who Smiles at Death + Crystalline Crawler + Aggravated Assault + Arcbound Overseer + Spawning Pit
Alesha, Who Smiles at Death
Crystalline Crawler
Aggravated Assault
Arcbound Overseer
Spawning Pit
Infinite artifact ETBInfinite artifact LTBInfinite artifact sacrifice triggersInfinite charge counters on a permanentInfinite combat phasesInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggersInfinite mana creatures you control can produceInfinite untap of creatures you control
How it works
Activate Crystalline Crawler's second ability by tapping it, putting a +1/+1 counter on it.
Activate Spawning Pit by sacrificing Arcbound Overseer.
When Arcbound Overseer dies, it triggers, putting its +1/+1 counters on Crystalline Crawler.
Resolve the Spawning Pit ability.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding 3.
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.
Declare Alesha as an attacker, triggering its ability, targeting Arcbound Overseer.
Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding W/BW/B.
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.