Dark Delirium Senche

"There is madness in all of us, and senches don't commit to anything half-heartedly. I came across one such mad senche and still bear the scars of its wild attacks. To take one on an adventure, you'd have to be mad as Sheogorath himself!"—Vi Aspblade.

Source: in-game description.

This model has additional visual effects applied to it in-game.