Corridor Monitor + Splinter Twin

UR identity

Commander legal

The 2 combo pieces

• Corridor Monitor
• Splinter Twin

How to execute it

1. Activate Corridor Monitor by tapping it, creating a token copy of itself with haste.
2. When the token Corridor Monitor enters the battlefield, it triggers, untapping the nontoken Corridor Monitor.
3. Repeat.

What the combo produces

• Infinite creature tokens with haste
• Infinite ETB