Goblin Bombardment + Hardened Academic + Trapjaw Kelpie

RGWU identity

Commander legal

The 3 combo pieces

• Goblin Bombardment
• Hardened Academic
• Trapjaw Kelpie

How to execute it

1. Activate Goblin Bombardment by sacrificing Trapjaw Kelpie.
2. When Trapjaw 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 Trapjaw Kelpie.
4. Resolve the Goblin Bombardment ability.
5. Repeat.

What the combo produces

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