Shade
Monster Junkie
Combat: Necromantic sludge can sense sentient humanoid life within 100 yards, and it attacks relentlessly with little regard for its own safety, seeking to feed on the life energy of its victims, This keen perception makes it impossible to surprise the monstrous goo.
Lifesense rather than blindsight?
Necromantic sludge is poisonous to the touch, and casual contact inflicts 1 hp damage per round.
Contact poison or acid?
In melee, the sludge lashes out with a pseudopod, inflicting 1d4+2 hp damage per successful strike. If the sludge slays an opponent, it attaches itself to the body to be absorbed through the skin, which turns dark gray within one round, regardless of the victim’s original skin color. The body becomes a zombie in all respects, under the control of the sludge. After a few months, the decaying zombie body is discarded, unless a fresh body is encountered earlier.
I think the normal zombie template should suffice.
Necromantic sludge reflects spells as a ring of spell turning, except that it reflects 100% of a spell’s or magical item’s effect.
Something like the nerra's reflective spell resistance?
The sludge is vulnerable to normal weapons, but magical attack and damage bonuses are not counted.
Interesting…