Mikaeus, the Unhallowed + Ashnod's Altar + Persistent Constrictor

Prerequisites

—

Steps

1. 1Activate Ashnod's Altar by sacrificing Persistent Constrictor.
2. 2When Persistent Constrictor dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. 3Activate Ashnod's Altar by sacrificing Persistent Constrictor.
4. 4When Persistent Constrictor dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
5. 5Repeat.

Effects

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