Dark knight abilities. Uncreative.

[fm_fenrir]

Shadowskin (level 2)
Heals 25% of all damage taken.
Duration: 20 seconds.
Recast: 80 seconds.
(Does not prevent one shots.)

I actually like this as a Living Dead replacement (minus the super-short CD, should be more like 120 seconds). Serves functionally the same purpose (since things meant to one-shot you still do), but you can just light it off and give the healers a break during dps checks.

edit: You could also change the wording to read "heals 25% of incoming damage from most attacks" so it reads similarly to Holmgang or Hallowed Ground.