Silver Crow, Winged Gaurdian

Flying
Whenever you cast a spell, put a +1/+1 counter on SIlver Crow, Winged Gaurdian for each of that spell's colors.
Remove five +1/+1 counters from Ramos: Add {w}{w}
{u}{u}{b}{b}{r}{r}{g}{g}. Activate only once each turn.