Ashnod's Altar, and Support Mission

Prerequisites

• Ashnod's Altar on the battlefield
• Support Mission on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When the persist creature enters, Support Mission triggers, putting a +1/+1 counter on that creature
4. Repeat

Results

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite creature sacrifice triggers