The Ruby Sanctum is a raid in the World of Warcraft game. The minimum level for this dungeon is 80. The location of the entrance to The Ruby Sanctum is in the Dragonblight zone on the continent of Northrend. The instance was released in the Wrath of the Lich King expansion. The raid contains 4 bosses. The end boss of The Ruby Sanctum is Halion.
The Ruby Sanctum was a filler raid, it was meant to occupy players before the next expansion came out. The story was that a dragon who belonged to Deathwings legion of dragons The raid is similar to The Obsidian Sanctum in that there are four bosses in the zone and its entrance is in Wyrmrest Temple. When going for the raid, make sure that you enter the right one, not OS. Unlike OS as the other raid is commonly known as, there is little way in terms of achievements and no mounts to be had.
The locations of both Ruby and Obsidian Sanctums are beside one another so you need to make sure you enter the correct one. The Obsidian Sanctum resembles a volcanic area whereas Ruby is peaceful and very green.