The Invincible is Arthas Menethil's personal mount, and one of the most legendary and prestigious mounts in World of Warcraft. It's a flying undead horse and one of the first mounts in the game with an element of extreme exclusivity. Because you can only get it in the 25-player Heroic version of the Icecrown Citadel raid. Seasoned players have already started accumulating TBC Classic Gold, and...