Greenbrog
Insider
I wouldn't expect bonus damage, taking an attack that doesn't get a chance to be blocked or parried is a huge advantage, you could definitely one shot things. Stealth... lot of talk on it, but the undead don't need light they can see you just fine in pitch dark. Being quieter though... that could be nice. Balancing a stealth mechanic and not have it ultimately be contrived is going to be very hard. But I think being quieter is a good one though, that could literally be a toggle that causes a move penalty or some such, obviously harder in metal. Making it make sense AND not just being "win" is going to take some creativity, and makes me think it cost to benefit may make it relatively unfeasible.