Isochron Scepter + Call to Glory + Skilled Animator

Isochron Scepter

Call to Glory

Skilled Animator

How it works

1. Cast Skilled Animator by paying 2.
2. Skilled Animator enters the battlefield, targeting Isochron Scepter, causing it to become an artifact creature until end of turn.
3. Activate creatures you control by tapping those, adding 3.
4. Activate Isochron Scepter by paying 2 and tapping it, casting a copy of Call to Glory without paying its mana cost, untapping all creatures.
5. Repeat from step 3.