Gogo, Master of Mimicry + The Thirteenth Doctor

GU identity

Commander legal

The 2 combo pieces

What must be in place

Creatures you control that have counters on them can tap to produce at least {2}.
Gogo has a counter on it.

How to execute it

  1. At the beginning of your end step, The Thirteenth Doctor triggers.
  2. Holding priority, activate any number of creatures you control that have counters on them by tapping them, adding at least {2}.
  3. Activate Gogo by paying {2} and tapping it, copying The Thirteenth Doctor's trigger.
  4. Resolve the copy of The Thirteenth Doctor's trigger, untapping all creatures you control that have a counter on them.
  5. Repeat from step 2.

What the combo produces