Phyrexian Altar + Master Biomancer
Produces: Infinite ETB, Infinite LTB, Infinite colored mana, Infinite death triggers, Infinite sacrifice triggers
- Phyrexian Altar
- Master Biomancer
- Color identity
- GU
Steps
- Activate Phyrexian Altar by sacrificing the persist creature.
- 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 Master Biomancer.
- Repeat.