Counterspell (Prepared) Feat 1
Source Pathfinder Advanced Player's Guide
Trigger A creature Casts a Spell that you have prepared
When a foe Casts a Spell and you can see its manifestations, you can use your own magic to disrupt it. You expend a prepared spell to counter the triggering creature's casting of that same spell. You lose your spell slot as if you had cast the triggering spell. You then attempt to counteract the triggering spell.
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.
AbjurationEffects and magic items with this trait are associated with the abjuration school of magic, typically involving protection or wards.
ArcaneThis magic comes from the arcane tradition, which is built on logic and rationality. Anything with this trait is magical.
WitchThis indicates abilities from the witch class.
WizardThis indicates abilities from the wizard class.