When a creature or object you can see or hear casts a spell, you may use your reaction to cause the caster to make a Wisdom Saving throw agaisnt your spell save DC. If it fails, the spell is frozen in time at the moment of casting and held within a gray bead, which falls safely to the ground.
This bead is a Tiny size object with an AC of 15 and 1 hit point and lasts for 1 hour. It is immune to psychic and poison damage. When the duration ends or if the bead is destroyed, it vanishes in a flash of light and the spell is lost.
A creature holding the bead can use its action to release the spell within, whereupon the bead disappears. The spell uses the attack bonus and save DC of the original casting creature or object, but treats the creature who released it as the caster for all other purposes.
* - A spell being cast ** - (A platinum bracelet worth at least 200 GP, worn on the wrist)
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