Emptiness, Phyrexian Altar, and Mikey & Mona, Mutant Sitters

Prerequisites

• Emptiness in hand
• Phyrexian Altar on the battlefield
• Mikey & Mona, Mutant Sitters in the graveyard
• available

Steps

1. Cast Emptiness for its evoke cost by paying
2. When Emptiness enters, its first ability and evoke ability trigger
3. Holding priority, activate Phyrexian Altar by sacrificing Emptiness, adding
4. Resolve Emptiness's evoke trigger, failing to sacrifice it as it's no longer on the battlefield
5. Resolve Emptiness's first trigger, returning Mikey & Mona from your graveyard to the battlefield
6. When Mikey & Mona enters, it triggers, returning Emptiness from your graveyard to your hand
7. Activate Phyrexian Altar by sacrificing Mikey & Mona, adding
8. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite storm count