Arcane CountermeasureFocus 5
Source Pathfinder Core Rulebook
Cast
(somatic)Range 120 feet
Target the spell cast by the triggering creature
Trigger A creature within range that you can see Casts a Spell.
You undermine the target spell, making it easier to defend against. You reduce the spell's level by 1, and targets of the spell gain a +2 status bonus to any saving throws, skill checks, AC, or DC against it. You can't reduce the spell's level below its minimum.
For example, a 5th-level cone of cold would remain 5th-level, but a 5th-level fireball would become 4th-level. Targets still gain all the other benefits, even if you don't reduce the spell's level.
Spell Effect: Arcane Countermeasure
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
AbjurationEffects and magic items with this trait are associated with the abjuration school of magic, typically involving protection or wards.
SorcererThis indicates abilities from the sorcerer class.