Anti-Venom, Horrifying Healer, Cloudstone Curio, Great Whale, and Yahenni, Undying Partisan

Prerequisites

• Anti-Venom, Horrifying Healer in hand
• Cloudstone Curio on the battlefield
• Great Whale in the graveyard
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate up to seven lands by tapping them, adding at least
2. Cast Anti-Venom by paying
3. When Anti-Venom enters, its first ability and Cloudstone Curio trigger
4. Resolve the Cloudstone Curio trigger, returning nothing to your hand
5. Resolve the Anti-Venom trigger, returning Great Whale from your graveyard to the battlefield
6. When Great Whale enters, it and Cloudstone Curio trigger
7. Resolve the Great Whale trigger, untapping up to seven lands
8. Resolve the Cloudstone Curio trigger, returning Anti-Venom from the battlefield to your hand
9. Activate Yahenni by sacrificing Great Whale
10. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite mana lands you control can produce
• Infinite untap of lands you control