Mikaeus, the Unhallowed + Defiant Greatmaw + Ashnod's Altar

Prerequisites

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

Steps

1. 1Activate Ashnod's Altar by sacrificing Defiant Greatmaw, adding
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. 5Repeat.

Effects

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