Bjorna, Nightfall Alchemist + Othelm, Sigardian Outcast + Intruder Alarm + Cathodion

Prerequisites

• Bjorna and Othelm do not have summoning sickness.

Steps

1. 1Activate Bjorna by tapping it and sacrificing Cathodion, targeting any creature.
2. 2Cathodion dies, adding .
3. 3Activate Othelm by paying and tapping it, returning Cathodion from your graveyard to the battlefield.
4. 4Cathodion enters the battlefield, triggering Intruder Alarm, untapping all creatures.
5. 5Repeat an arbitrarily large number of times.
6. 6Resolve all Bjorna abilities, dealing infinite damage to any creature(s).

Effects

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