Biomancer's Familiar + Gilder Bairn + Tazri, Stalwart Survivor

WUBRG identity

Commander legal

The 3 combo pieces

What must be in place

Gilder Bairn does not have summoning sickness.

How to execute it

  1. Activate Gilder Bairn by tapping it, adding {G/U} that can only be spent to activate abilities.
  2. Activate Gilder Bairn by paying {G/U} and untapping it, doubling each counter on target permanent.
  3. Repeat.

What the combo produces