Cavern Harpy + Kentaro, the Smiling Cat + Rukarumel, Biologist + Urza's Incubator

WUBRG identity

Commander legal

The 4 combo pieces

What must be in place

"Samurai" chosen with Urza's Incubator and Rukarumel.

How to execute it

  1. Cast Cavern Harpy by paying {0}.
  2. When Cavern Harpy enters the battlefield, it triggers, returning itself from the battlefield to your hand.
  3. Repeat.

What the combo produces