People will pay 100k+ easy for a 20% death wrapping. Same for curses and blood. Necros have a lot to gain from that +1 because most have one of their attributes at 16 and 17 gives them that next jump on many skills (5, 9, 13 and 17) like raising 19 lvl Bone fiends, getting a +4 siphon or getting a +7 energy regen BiP

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Back on the PC, id say 40k-50k for the 19% death wrapping.