Grazing Kelpie + Hardened Academic + Shilgengar, Sire of Famine

WUBRG identity

Commander legal

The 3 combo pieces

• Grazing Kelpie
• Hardened Academic
• Shilgengar, Sire of Famine

How to execute it

1. Activate Shilgengar 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 Shilgengar ability.
5. Repeat.

What the combo produces

• Infinite Blood tokens
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers