Katrina, Renegade Artificer

Haste
You may cast artifact spells as though they had
flash. (You may cast them any time you could
cast an instant)
Whenever you cast a non-creature spell put a
+1/+1 counter on Katrina, Renegade Artificer.
Then if there are three or more +1/+1 counters
on it, transform Katrina, Renegade Artificer.