Oryx, the Taken King

Flying, Deathtouch
{1}{u}{b}{g}: Gain control of target creature, it becomes a Taken in addition with it's other types. Then if you control less then 4 Takens, tap Oryx.
Whenever a creature you don't control enters the battlefield, if you control 5 or more Takens, you gain control of it. It becomes a Taken in addition with it's other types.