Kulu Ya-Ku, Ovivore Outlaw

When Kulu Ya-Ku, Ovivore Outlaw enters
the battlefield, take control of target artifact or equipment. When Kulu Ya-Ku, Ovivore Outlaw leaves the battlefield, give the artifact or equipment to target opponent.

As long as Kulu Ya-Ku, Ovivore Outlaw is on the battlefield, other Great creatures you control get +1/+1.