(1) Unaffected by other card effects.
(2) Each time a monster your opponent controls activates an effect, put 1 Wedge Counter on that monster when that effect resolves (max 1).
(3) Once per turn: You can target 1 monster your opponent controls that has a Wedge Counter; take control of it.
(4) Once per turn, during your End Phase: You can destroy all monsters on the field with Wedge Counters.