Alesha, Who Smiles at Death, Crystalline Crawler, Aggravated Assault, Arcbound Overseer, and Phyrexian Altar

Prerequisites

• Alesha, Who Smiles at Death on the battlefield
• Crystalline Crawler on the battlefield
• Aggravated Assault on the battlefield
• Arcbound Overseer on the battlefield
• Phyrexian Altar on the battlefield
• available available

Steps

1. Activate Crystalline Crawler's second ability by tapping it, putting a +1/+1 counter on it
2. Activate Phyrexian Altar by sacrificing Arcbound Overseer, adding
3. When Arcbound Overseer dies, it triggers, putting its +1/+1 counters on Crystalline Crawler
4. Activate Crystalline Crawler's first ability four times by removing four +1/+1 counters from it, adding
5. Activate Aggravated Assault by paying , 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
8. Resolve the Alesha trigger, causing you to pay 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

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite +1/+1 counters on artifact creatures you control