Grazing Kelpie + Hardened Academic + Umbral Collar Zealot

WUBRG identity

Commander legal

The 3 combo pieces

• Grazing Kelpie
• Hardened Academic
• Umbral Collar Zealot

How to execute it

1. Activate Umbral Collar Zealot by sacrificing Grazing Kelpie.
2. When Grazing Kelpie 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 Grazing Kelpie.
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