Necroduality, Rot Hulk, and Accursed Centaur

Prerequisites

• Necroduality on the battlefield
• Rot Hulk in hand
• Accursed Centaur 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 Accursed Centaur from your graveyard to the battlefield
4. When Accursed Centaur enters, it and Necroduality trigger
5. Resolve the Accursed Centaur trigger, sacrificing it
6. Resolve the Necroduality trigger, creating a token copy of Accursed Centaur
7. When the token Accursed Centaur enters, it triggers, sacrificing Rot Hulk
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

• Infinite ETB
• Infinite LTB
• Infinite creature tokens
• Infinite death triggers
• Infinite sacrifice triggers
• Return some creature cards from your graveyard to the battlefield