You've perfected your ability to keep up with all the skills you've learned over your long life, so you're almost never truly untrained at a skill.
Elf
Feat type
Ancestry Feat
Level
13
Traits
Elf
Prerequisites
Ancestral Longevity
Frequency
once per day
Actions
1 action
You've perfected your ability to keep up with all the skills you've learned over your long life, so you're almost never truly untrained at a skill. You reflect on your life experiences, changing the skill you selected with Ancestral Longevity (and the skill you selected with Expert Longevity if you have that feat).
Source: Pathfinder Player Core, p. 49
Bring Universal Longevity into a Pathfinder 2e game with The DM Screen.