Crab Umbra + Steward of the Harvest + Tolarian Academy

GU identity

The 3 combo pieces

What must be in place

You control at least four artifacts.

How to execute it

  1. Activate the creature with Crab Umbra attached using Tolarian Academy's ability by tapping it, adding at least {U}{U}{U}{U}.
  2. Activate Crab Umbra by paying {2}{U}, untapping the creature.
  3. Repeat.

What the combo produces