Thieving Skydiver [The Lost Caverns of Ixalan Commander]

Kicker X. X can't be 0. (You may pay an additional X as you cast this spell.)

Flying

When Thieving Skydiver enters the battlefield, if it was kicked, gain control of target artifact with converted mana cost X or less. If that artifact is an Equipment, attach it to Thieving Skydiver.