Hardened Academic + Persistent Constrictor + Umbral Collar Zealot

RWB identity

Commander legal

The 3 combo pieces

• Hardened Academic
• Persistent Constrictor
• Umbral Collar Zealot

How to execute it

1. Activate Umbral Collar Zealot by sacrificing Persistent Constrictor.
2. When Persistent Constrictor dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Hardened Academic triggers, putting a +1/+1 counter on Persistent Constrictor.
4. Resolve the Umbral Collar Zealot ability.
5. Repeat.

What the combo produces

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