Elder Druid + Isochron Scepter + To Arms!

GW identity

Commander legal

The 3 combo pieces

What must be in place

Creatures you control can tap to produce at least {5}{G}.
Elder Druid does not have summoning sickness.
To Arms! exiled by Isochron Scepter.

How to execute it

  1. Activate any number of creatures you control by tapping them, adding at least {5}{G}.
  2. Activate Isochron Scepter by paying {2} and tapping it, casting a copy of To Arms! without paying its mana cost.
  3. Resolve To Arms!, untapping all creatures you control.
  4. Activate Elder Druid by paying {3}{G} and tapping it, untapping Isochron Scepter.
  5. Repeat.

What the combo produces