Othelm, Sigardian Outcast + Myr Battlesphere + Intruder Alarm + Ashnod's Altar

Prerequisites

• Othelm does not have summoning sickness.

Steps

1. 1Activate Ashnod's Altar by sacrificing Myr Battlesphere, adding .
2. 2Activate Othelm by paying and tapping it, returning Myr Battlesphere from your graveyard to the battlefield tapped.
3. 3Myr Battlesphere enters the battlefield, triggering itself and Intruder Alarm.
4. 4Resolve the Intruder Alarm trigger, untapping all creatures.
5. 5Resolve the Myr Battlesphere trigger, creating four 1/1 Myr artifact creature tokens.
6. 6The Myr tokens enter the battlefield, triggering Intruder Alarm four times, untapping all creatures.
7. 7Repeat.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures