Hardened Academic + Lesser Masticore + Yahenni, Undying Partisan

RWB identity

Commander legal

The 3 combo pieces

• Hardened Academic
• Lesser Masticore
• Yahenni, Undying Partisan

How to execute it

1. Activate Yahenni by sacrificing Lesser Masticore.
2. When Lesser Masticore 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 Lesser Masticore.
4. Resolve the Yahenni ability.
5. Repeat.

What the combo produces

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