Mikaeus, the Unhallowed + Defiant Greatmaw + Yahenni, Undying Partisan

Prerequisites

• Defiant Greatmaw does not have a +1/+1 counter on it.

Steps

1. 1Activate Yahenni by sacrificing Defiant Greatmaw.
2. 2When Defiant Greatmaw dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. 3When Defiant Greatmaw enters the battlefield, its first ability triggers, putting two -1/-1 counters on it.
4. 4Defiant Greatmaw's second ability triggers, removing a -1/-1 counter from another creature you control.
5. 5Resolve the Yahenni ability from step 1, causing it to gain indestructible until end of turn.
6. 6Repeat.

Effects

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