Xol, Will of Thousands

Flying, Trample
{4}{u}{b}{r}{t}: Gain control of target creature or plainswalker.
{u}{b}{r}: Xol gains +x/+0 until end of turn, where
x is the number of creatures and plainswalkers
you control that you don't own.
{8}{u}{b}{r}{t}: Take control of target player's next
turn. Xol doesn't untap during your next untap
step.
Whenever you take control of a permanent,
draw a card.