Planar Concussion

If an opponent activated two or more loyalty abilities this turn, you may pay {0} rather than pay Planar Concussion's mana cost.
Planar Concussion deals 2 damage to target planeswalker.
Disrupt - Counter target ability of target planeswalker if that planeswalker has taken at least 4 damage since that ability entered the stack (including the damage dealt by Planar Concussion).
Some are not mentally prepared enough for alternate dimensions.