In the charred, desolate Wyrmbog, deep in Dustwallow Marsh, lies the lair of the black dragon Onyxia. Many bands of heroes have journeyed there, only to fall under the dragon's claw. Now take on the role of Onyxia and face the latest group of heroes brave enough to challenge the Black Dragonflight. It's time to put some foolish mortals in their place! Onyxia Lair Raid Decks open up a whole new facet to the World of Warcraft® Trading Card Game (TCG). One player takes on the role of an epic foe that only multiple heroes working together can even hope to challenge. Each Onyxia raid deck includes 110 Onyxia Game Cards plus one 10-card ''Treasure Pack'' and three oversized Onyxia raid boss cards. This limited edition raid deck requires players to build their raid parties by using cards from the World of Warcraft® TCG: Heroes of Azeroth™.