Voayaje, Master Lawbreaker

At the beginning of your upkeep, create a
treasure token.
Whenever Voayaje attacks, you may sacrifice X
Treasures. If you do, gain control of target
nonland permanent an opponent controls with
converted mana cost X.
Voayaje had accomplished many masterful feats in
his life, but infiltrating Bougass Island was beyond
anything he had ever thought possible.