After looking at the unholy mastery change and how it just mimics frost, I had a bit of an idea. What would other DKs think if the unholy mastery was necrosis, but a bit modified. Scaling unsure of hence the "%" and the pet and minion part is on since unholy does use both. Any thoughts/suggestions would be nice.
Unholy Mastery: Necrosis
Allows you, your pet and minions melee damage deal an additional % of the damage as shadow damage.