Alpha, Beta, Unlimited, Collector's Edition, International Collector's Edition, Revised, Quarta, Introductionary Two-Player:The Wall of Bone is said to be an aspect of the Great Wall in Hel, where the bones of all sinners wait for Ragnarok, when Hela will call them forth for the final battle.
Quinta:"Good neighbors make good walls." - Jakkarak the Maimer
Settima:A skeletal wall, strengthened by the souls of traitors, rings the city of the Eastern Paladin.
Garruk vs Liliana:"Graveyards are sacrilege! A waste of perfectly good bones." — Keren-Dur, necromancer lord