Gretchen Titchwillow + Oboro Breezecaller + Tolarian Academy

GU identity

The 3 combo pieces

What must be in place

You control at least five artifacts.

How to execute it

  1. Activate Tolarian Academy by tapping it, adding at least {U}{U}{U}{U}{U}.
  2. Activate a land that enters untapped by tapping it, adding at least {G}.
  3. Activate Oboro Breezecaller by paying {2} and returning the land that taps for {G} from the battlefield to your hand, untapping Tolarian Academy.
  4. Activate Gretchen by paying {2}{G}{U}, causing you to draw a card and put the land from step 3 onto the battlefield.
  5. Repeat.

What the combo produces