Silence

Silence is a level 50 Shadow priest ability. It silences the target, preventing them from casting spells for 5 seconds, and acts against an interrupt against non-player targets.

Trivia

 * Silence is a common Priest spell in Hearthstone. The flavor text reads: "Reserved for enemy spellcasters, evil liches from beyond the grave, and karaoke nights at the Grim Guzzler."