Ring of CounterspellsEquipment 10
Source Pathfinder Core Rulebook
Price 925 gp
Weight negligible
This ornate silver ring bears two competing geometric designs of brightly colored and wildly clashing inlaid gemstones. A spellcaster can cast a single spell into this ring as long as no spell is currently stored within, expending the normal time, costs, and so forth to Cast the Spell. The spell's effect doesn't occur; the spell's power is instead stored within the ring.
When you invest a ring of counterspells, you immediately know the name and level of the spell stored inside, if any. A ring of counterspells found as treasure has a 50% chance of having a spell stored in it. The GM determines that spell.
Activate 
envision
Trigger You are targeted by or within the area of the spell stored within the ring
Effect You can attempt to counteract the triggering spell, using the level of the spell stored in the ring and a counteract modifier of 1d20+19. Once you do, the stored spell's energy is spent, and the ring is empty.
Activate 
command
Effect You harmlessly expend the stored spell, having no effect but emptying the ring so that another spell can be cast into it.
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.
InvestedA character can wear only 10 magical items that have the invested trait. None of the magical effects of the item apply if the character hasn't invested it, nor can it be activated, though the character still gains any normal benefits from wearing the physical item (like a hat keeping rain off their head).
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.