Say I were to sit on Santa's lap and he asked me what I could have for Starlight Celebration I would ask for:

Living Dead stays as it is PLUS Walking Dead would afflict a chosen enemy with the effect "Vengeance of the Fallen." If the Healer doesn't heal me and within the time limit Walking Dead kills me, then the marked target takes damage equal to my entire health bar.

Not gonna happen, I know. It would get totally abused, and some healers would purposefully not heal DRKs for the damage, but wouldn't that just be a very lore consistent "F*ck you!" for a DRK to have?