Phyrexian Altar, and Bioengineered Future

Prerequisites

• Phyrexian Altar on the battlefield
• Bioengineered Future on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing the persist creature, adding one mana
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 and at least one +1/+1 counter on it due to Bioengineered Future
3. Remove a -1/-1 counter and a +1/+1 counter from the creature as a state-based action
4. Repeat

Results

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