Legend

As you strike your last blow, the chill wraith makes no last sound, it simply disappears and the room becomes significantly warmer and darker. You wonder what would create such a creature. Did he die during some sort of blizzard and froze to death? Well enough on dwelling on such things, you open up the coffin to find a decomposed corpse clutching a single large sapphire. You may take it if you wish.

No other place to go now, but head back and down the right corridor.