Othelm, Sigardian Outcast, Ashnod's Altar, and Breaching Hippocamp

Prerequisites

• Othelm, Sigardian Outcast on the battlefield
• Ashnod's Altar on the battlefield
• Breaching Hippocamp on the battlefield
• Othelm does not have summoning sickness

Steps

1. Activate Ashnod's Altar by sacrificing Breaching Hippocamp, adding
2. Activate Othelm by paying and tapping it, returning Breaching Hippocamp from your graveyard to the battlefield
3. Breaching Hippocamp enters the battlefield, untapping Othelm
4. Repeat

Results

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