Vauxus, Mutagenesis Specialist

(Proxy for Ramos, Dragon Engine.)
Flying
Whenever you cast a spell, put a +1/+1 counter
on Vauxus for each of that spell's colors.
Remove five +1/+1 counters from Vauxus: Add
{w}{w}{u}{u}{b}{b}{r}{r}{g}{g}. Activate only once
each turn.