Mikaeus, the Unhallowed + Phyrexian Altar + Persistent Constrictor
Produces: Infinite ETB, Infinite LTB, Infinite colored mana, Infinite death triggers, Infinite sacrifice triggers
- Mikaeus, the Unhallowed
- Phyrexian Altar
- Persistent Constrictor
- Color identity
- B
Steps
- Activate Phyrexian Altar by sacrificing Persistent Constrictor.
- When Persistent Constrictor dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
- Activate Phyrexian Altar by sacrificing Persistent Constrictor.
- When Persistent Constrictor dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
- Repeat.