Blood of the Master

Acquisition
Skill Quests: Skill Trainers: Signet of Capture:
 * The Hot Springs Murders (Nebo Terrace)
 * Sorim (Quarrel Falls)
 * Master Scout Kiera (Henge of Denravi)
 * Dakk (Ember Light Camp)
 * Mazzim {Fishermen's Haven}
 * Zhao Di {Shing Jea Monastery}
 * ... more to be added ...

WARNING
Due to the Factions and other Updates, Blood of the Master now heals all minions. If you have at least 5 Minion Masters, you can actually kill yourself using this skill.

Sacrifice works like so:

If you keep this progression up, 4 minion masters with 10 minions tied to them is an 85% sacrifice. With 5 or more minion masters controlling 48 minions, this skill will sacrifice 101%. This means that you will kill your character to heal all minions for whatever your level is in death magic (see the above chart for level to healing ratio).

The use of Aura of the Lich helps to counter the sacrifice costs. A swarm of 4-5 Vampiric Horrors is usually enough to counter all sacrifice costs for about 10 Minions altogether, while spaming Blood of the Master.