Prophet of the demiurge

Hexproof, host(3), pattern seeker, remnant(4)

When this card enters the battlefield, put one +1/+1 counter on it for each creature a player controls but doesn't own.

You may pay -{2} anytime you use mana to change ownership of a creature (minimum of {3} unless card costs less). If this is done, ignore all other effects.

{t},{b}{g}{u}: target opponent takes control of target creature or take back a creature you own