Escape Artist (alliance ability, gnome hero)
    Choose one: Interrupt target ability card that's targeting your hero; or if your hero is defending, remove all attackers from combat.

Arcane Torrent (horde ability, blood elf hero)
    Interrupt all other ability cards. Opponents can't play abilities this turn.

Tyrus Sheynathren (horde ally)
    (3), Destroy Tyrus Sheynathren --> Interrupt target ability card.




Counterspell (mage ability)
    Interrupt target ability card

Shield Bash (warrior ability)
    Your hero deals 1 damage to target hero or ally. If you targeted a hero, you may interrupt an ability card played by its controller.
    
Kick (rogue ability)
    Your hero deals 2 melee damage to target hero or ally. If you targeted a hero, you may interrupt an ability card played by its controller.

Silent Fang (weapon: hunter/paladin/rogue/warrior)
    Destroy Silent Fang --> Interrupt target ability card.




===== Combos with Forbidden Knowledge =====
    Escape Artist (cost 1!!) + Dizdemona