Ward Against Corruption Feat 5
Source Pathfinder Advanced Player's Guide
Your soul is warded against the power of undeath and plague, as well as that of the evil former psychopomps known as sahkils. You gain a +1 circumstance bonus to saving throws against death effects, disease, and all effects from undead or sahkils. This bonus increases to +2 against an undead or sahkil's death effect or disease.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
DuskwalkerA creature with this trait has the duskwalker versatile heritage. Duskwalkers are planar scions infused with the supernatural energy of psychopomps. An ability with this trait can be used or selected only by duskwalkers.