Ashnod's Altar, Wormfang Drake, and Hero of the Dunes

Prerequisites

• Ashnod's Altar on the battlefield
• Wormfang Drake in hand
• Hero of the Dunes on the battlefield
• available

Steps

1. Cast Wormfang Drake by paying its mana cost
2. When Wormfang Drake enters, its first ability triggers, exiling Hero of the Dunes
3. Activate Ashnod's Altar by sacrificing Wormfang Drake
4. When Wormfang Drake dies, its second ability triggers, returning Hero of the Dunes from exile to the battlefield
5. When Hero of the Dunes enters, it triggers, returning Wormfang Drake from your graveyard to the battlefield
6. When Wormfang Drake enters, its first ability triggers, exiling Hero of the Dunes
7. Repeat from step 3

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite sacrifice triggers