Arcbound Prototype + Ashnod's Altar + Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

WB identity

Commander legal

The 3 combo pieces

• Arcbound Prototype
• Ashnod's Altar
• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

How to execute it

1. Activate Ashnod's Altar by sacrificing Arcbound Prototype.
2. When Arcbound Prototype dies, its modular ability and persist ability trigger.
3. Resolve the modular trigger, putting Arcbound Prototype's +1/+1 counters on another artifact creature.
4. Resolve the persist trigger, returning Arcbound Prototype from your graveyard to the battlefield. It will not have a -1/-1 counter on it due to its modular ability.
5. Repeat.

What the combo produces

• Infinite +1/+1 counters on certain creatures
• Infinite colorless mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers