Hardened Academic + Kithkin Spellduster + Shilgengar, Sire of Famine

RWB identity

Commander legal

The 3 combo pieces

• Hardened Academic
• Kithkin Spellduster
• Shilgengar, Sire of Famine

How to execute it

1. Activate Shilgengar by sacrificing Kithkin Spellduster.
2. When Kithkin Spellduster 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 Kithkin Spellduster.
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