Ashnod's Altar, and Bioengineered Future

Prerequisites

• Ashnod's Altar on the battlefield
• Bioengineered Future 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 without a -1/-1 counter on it due to Bioengineered Future
3. Repeat

Results

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