Fundamental Understanding

If the triggering spell is common and you’re trained in the associated skill for the spell’s tradition, you automatically identify the spell being cast (you still roll to attempt to get a critical success but can’t get a worse result than a success). You or a visible ally within 60 feet targeted by this spell gain a +1 circumstance bonus to your saving throw or your AC against it (or a +2 circumstance bonus if you rolled a critical success).