Dark Tetragon As long as the Bloodthirster, Lord of Change, Great Unclean One and Keeper of secrets are alive, draw connecting lines to all four them and form the Tetragon of Darkness from the shape created from the joining lines. As long as the Tetragon is in effect, the following rules apply to all models.
All friendly Daemon models re-roll their Invunerable save.
All models inside the Tetragon gets shrouded.
