Necroduality, Rot Hulk, and Fleshbag Marauder

Prerequisites

• Necroduality on the battlefield
• Rot Hulk in hand
• Fleshbag Marauder in the graveyard
• available

Steps

1. Cast Rot Hulk by paying
2. When Rot Hulk enters, it and Necroduality trigger
3. Resolve the Rot Hulk trigger, returning Fleshbag Marauder from your graveyard to the battlefield
4. When Fleshbag Marauder enters, it and Necroduality trigger
5. Resolve the Fleshbag Marauder trigger, sacrificing it and causing each opponent to sacrifice a creature
6. Resolve the Necroduality trigger, creating a token copy of Fleshbag Marauder
7. When the token Fleshbag Marauder enters, it triggers, sacrificing Rot Hulk and causing each opponent to sacrifice a creature
8. Resolve the Necroduality trigger from step 2, creating a token copy of Rot Hulk
9. When the token Rot Hulk enters, it triggers, returning Rot Hulk from your graveyard to the battlefield
10. Repeat from step 2

Results

• Each opponent sacrifices all creatures they control
• Infinite ETB
• Infinite LTB
• Infinite creature tokens
• Infinite death triggers
• Infinite sacrifice triggers
• Return some creature cards from your graveyard to the battlefield