Board Thread:Off Topic/@comment-166.137.136.108-20150802231309/@comment-25350022-20150802234859

This is the Boethia Sacrifice, in the quest Boethiah's Calling.

Sacrifice a follower at the Pillar of Sacrifice, and Boethiah will use the corpse as a conduit and speak. At this time, you're meant to just listen to her/him speak, after which all the Boethiah followers will kill each other. If the quest won't proceed, it's a glitch.