Stellar dragon

Flying.
Your devotion to a colour is increased by how many lands you control that produce that colour.
{b}{b}{b}:draw X cards, X is equal to your devotion to blue.
{r}{r}{r}: destroy target creature with mana value X or less, X is equal to your devotion to black.
{u}{u}{u}: deal X damage divided among any targets, where X is you devotion to red.