[Necromancer] Bloodsucker should not damage characters under Decaying status
Why? - The reason for this change is because it is inconsistent. Bloodsucker, when cast on an Undead, heals them just fine, even though they have no blood in the first place.

Mosquito Swarm and the passive from causing vitality damage both heal living characters just fine when under the Decaying status, it is only Bloodsucker which does NOT.

Suggested Change: Change Bloodsucker to match Mosquito Swarm, so it heals living characters instead of hurting them when under Decaying status.