Hell Fighter 17, the Neutralizer (BT9-059) [Universal Onslaught]

Product Details

[Counter:Play] Play this card.
[Permanent] During your opponent's turn, reduce the energy cost of this card in your hand by 1.
[Auto] When you play this card or it is placed in a Drop Area from a Battle Area by a skill, choose up to 1 of your opponent's Battle Cards and negate its skills for the duration of the turn.