Ormanox the Chromamancer

If {w}{u}{b}{r}{g} was spent to cast Ormanox, it enters the battlefield with 5 +1/+1 counters on it.
Whenever you cast a multicolored spell, you get an experience counter.
Whenever a multicolored creature enters the battlefield under your control, you may put X +1/+1 counters on it, where X is the number of experience counters you have.