Your soul is resilient to energy draining attacks.
Prerequisite: Con 13, character Level 8th
Benefit: When you gain a negative level, you may immediately make a Fortitude save to shrug off the effects. If you fail the initial save, you may attempt a second save in 24 hours at a +4 bonus.
Undead that use enervating attacks that bestow negative levels gain only half the normal number of temporary hit points when attacking you (rounded down). Additionally, you can never be affected by an undead creature’s create spawn ability.
Normal: When you gain a negative level, you make a Fortitude save after 24 hours to determine whether the negative level results in permanent level loss.
Section 15: Copyright Notice – Feats 101
Feats 101. Copyright 2009, Steven D. Russell.