Necroduality, Rot Hulk, and Phyrexian Altar

Prerequisites

• Necroduality on the battlefield
• Rot Hulk in hand
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Rot Hulk by paying
2. Rot Hulk enters the battlefield, triggering itself and Necroduality
3. Holding priority, activate Phyrexian Altar by sacrificing Rot Hulk, adding one mana of any color
4. Resolve the Rot Hulk trigger, failing to return anything to the battlefield
5. Resolve the Necroduality trigger, creating a token copy of Rot Hulk
6. The token copy of Rot Hulk enters the battlefield, returning Rot Hulk from your graveyard to the battlefield
7. Repeat from step 2

Results

• Infinite colored mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Return all Zombies from your graveyard to the battlefield