Othelm, Sigardian Outcast, Ashnod's Altar, Cacophodon, and Marauding Raptor

Prerequisites

• Othelm, Sigardian Outcast on the battlefield
• Ashnod's Altar on the battlefield
• Cacophodon on the battlefield
• Marauding Raptor 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 Marauding Raptor, dealing 2 damage to Cacophodon and giving Marauding Raptor +2/+0 until end of turn
4. Cacophodon triggers, untapping Othelm
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely powerful Marauding Raptor until end of turn
• Infinite sacrifice triggers