Full House (25 player)

Full House (25 player) is an achievement in the 25man version of Icecrown Citadel

Source
is the second boss in Icecrown Citadel.

Strategy
Empowered Cult Adherents currently do not count. You will need a Cult Adherent, Cult Fanatic, Deformed Fanatic, Reanimated Fanatic and Reanimated Adherent up.