Arcane Sense Feat 1
Source Pathfinder Core Rulebook
Prerequisites trained in Arcana
Your study of magic allows you to instinctively sense its presence. You can cast 1st-level Detect Magic at will as an arcane innate spell. If you're a master in Arcana, the spell is heightened to 3rd level; if you're legendary, it is heightened to 4th level.
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.
GeneralA type of feat that any character can select, regardless of ancestry and class, as long as they meet the prerequisites. You can select a feat with this trait when your class grants a general feat.
SkillA general feat with the skill trait improves your skills and their actions or gives you new actions for a skill. A feat with this trait can be selected when a class grants a skill feat or general feat. Archetype feats with the skill trait can be selected in place of a skill feat if you have that archetype's dedication feat.