Betrayal

Betrayal is a common rogue spell card, inducted into the Legacy set, formerly from the Classic set.

Strategy
Minion placement becomes important when playing against a rogue: Betrayal allows them to use one of your friendly high-Attack minion as a "bomb" to take out the minions next to it. If expecting Betrayal, or playing against a rogue who might Discover it, try to place high-Attack minions on the far left or far right of your board, to prevent optimal Betrayal play.

Trivia

 * The artwork for this card comes from the World of Warcraft Trading Card Game "Worldbreaker" series, for the card Bully.

Patch changes

 * Moved from Classic to Legacy set.