There's only one loot from that "set", the Visage of the Girplan, and it doesn't exist in the Prize Pack.
Legend of the Jarsath Destroyer gives loot from the following expansions *according to the in game description* -The Jarsath Destroyer -Fall of the Estarim -Debt of the Ratonga -Drakkinshard
But its odd that they called it that if it doesn't contain the loot from its namesake's set. Of course, that would require the left hand to have some knowledge of what the right hand is doing.
