Gylton, Pleasant Pilferer

Whenever Gylton, Pleasant Pilferer deals combat damage to an opponent, create that many
colorless Treasure artifact token with "Tap,
Sacrifice this artifact: Add one mana of any
color."
Sacrifice X Treasure: Gain control of target
artifact or creature with converted mana cost X
or less until end of turn. Untap it. It gains haste
until end of turn.