The Undead Trap Axe (also known as the Haunted Hatchet) is a collectible accessory for Skylanders Trap Team, allowing players to capture and use escaped Undead element villains in the game, fitting into the clear/light blue crystal trap with an axe design. It's used with the game's "toy-to-life" mechanic, letting you pull captured foes into the game to fight for you, enhancing the adventure and villain quests.