Lord Vivec, Tribunal Master

Partner 2. (you may have three commanders if all
three have partner 2)
When Lord Vivec, Tribunal Master enters the battlefield, if you cast it, return it to your hand
and search your library for a card, named The
Heart of Lorkhan, shuffle your library and put
that card on top of it.
At the beginning of your endstep, gain control of target creature you don't control.