Sacrifice

Sacrifice is listed in several skills descriptions, mostly from the necromancer profession. When you successfully activate these skills, you are required to forfeit a percent of your maximum health to use the skill. It is possible to sacrifice yourself to death. Sacrifice is health loss and cannot be mitigated by any means. The only way to lower sacrifice costs is to lower your maximum health. Similar to Life Stealing, if your character uses a skill or effect that would sacrifice more Health than it actually has, it will lose all of its health plus 1. Health sacrifice also ignores the short span after resurrection during which accumulating of Death Penalty would be prevented.

Trivia

 * During the original Beta-testing for Guild Wars, sacrifice skills applied a fixed health cost rather than current method of using a fraction of the caster's base health. For example, Plague Sending cost exactly 25 health.