Echo of Tyrande

Flip 2 , Assault 4 , Long-Range Entrance : Tyrande deals 3 arcane damage to each Raiding hero for each Caverns hero that has been defeated. When Tyrande deals damage to a Raiding hero, if she has dealt 10 or more damage to that hero this turn, reveal cards from the top of the Caverns deck until a Boss ally is revealed. Put that ally into play and shuffle the other revealed cards into the Caverns deck. This power triggers only once per turn for each Raiding hero.