Dack's Duplicate + Felidar Guardian

URW identity

Commander legal

The 2 combo pieces

• Dack's Duplicate
• Felidar Guardian

How to execute it

1. Cast Dack's Duplicate by paying its mana cost, choosing to have it enter the battlefield as a copy of Felidar Guardian
2. When Dack's Duplicate enters the battlefield, it triggers, blinking Felidar Guardian.
3. When Felidar Guardian enters the battlefield, it triggers, blinking Dack's Duplicate. Choose to have Dack's Duplicate enter the battlefield as a copy of Felidar Guardian.
4. Repeat from step 2.

What the combo produces

• Infinite creature LTB
• Infinite ETB