Isochron Scepter + Karn's Touch + To Arms!

Mana needed: {U}{U}

WU identity

Commander legal

The 3 combo pieces

What must be in place

You control creatures that can tap to produce at least {3}.

How to execute it

  1. Cast Karn's Touch by paying {U}{U}, targeting Isochron Scepter, causing it to become an artifact creature until end of turn.
  2. Activate creatures you control by tapping those, adding {3}.
  3. Activate Isochron Scepter by paying {2} and tapping it, casting a copy of To Arms! without paying its mana cost, untapping all creatures.
  4. Repeat from step 2.

What the combo produces