Arhaveen, Aether Incarnate

Arhaveen gets +1/+1 for each {e} (energy counter)
you have up to 10.
At the beginning of your end step, you get {e}.
{w}{u}{b}{r}{g}: Draw 3 cards. Until end of turn, if
an effect you control gives you one or more {e}, you get twice that many {e} instead. Activate
this ability only any time you could cast a sorcery
and only once per turn.