Skillful Tail (Tiefling) Feat 5
Source Pathfinder Advanced Player's Guide
You've always had a tail, but with practice, you've learned to use it for more than signaling your mood.
You can perform simple Interact actions with your tail such as opening an unlocked door. Your tail can't perform actions that require fingers or significant manual dexterity, including any action that would require a check to accomplish, and you can't use it to hold items.
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.
TieflingA creature with this trait is a member of the tiefling ancestry.