Othelm, Sigardian Outcast, Ashnod's Altar, Cacophodon, and Terror of the Peaks

Prerequisites

• Othelm, Sigardian Outcast on the battlefield
• Ashnod's Altar on the battlefield
• Cacophodon on the battlefield
• Terror of the Peaks on the battlefield
• Othelm does not have summoning sickness

Steps

1. Activate Ashnod's Altar by sacrificing Cacophodon, adding
2. Activate Othelm by paying and tapping it, returning Cacophodon from your graveyard to the battlefield
3. Cacophodon enters the battlefield, triggering Terror of the Peaks, dealing damage equal to Cacophodon's power to Cacophodon
4. Cacophodon triggers, untapping Othelm
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers