Lab Rat Feat 5
Source Pathfinder Advanced Player's Guide
You've spent more than your share of time in an alchemy lab. You might have been an alchemist yourself, an assistant, or perhaps even a test subject. Either way, you have been exposed to a wide variety of alchemical poisons and elixirs, leaving you with increased tolerance of their effects.
You have a +1 circumstance bonus to saves against poison and harmful effects from elixirs. If you roll a success on your saving throw against an elixir or poison, you get a critical success instead.
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.
RatfolkA creature with this trait is a member of the ratfolk ancestry.