Balkan Master Thieves

At the beginning of your end step, exile the top 3
cards of target player's library. Create treasure
tokens equal to the highest CMC among them.
{t}, Sacrifice five treasures: Gain control of target
permanent.
{t}, Sacrifice X untapped treasures: Balkan
Master Thieves deals X damage to any target.
{t}, Sacrifice five permanents you don't own:
Gain control of target player for as long as you
control Balkan Master Thieves.