Horseshoe Crab + Jiang Yanggu, Wildcrafter + Nyxbloom Ancient

GU identity

Commander legal

The 3 combo pieces

What must be in place

Horseshoe Crab does not have summoning sickness.
Horseshoe Crab has at least one +1/+1 counter on it.

How to execute it

  1. Activate Horseshoe Crab by tapping it, adding {U}{U}{U}.
  2. Activate Horseshoe Crab by paying {U}, untapping it.
  3. Repeat.

What the combo produces