On success: The target attack spell fizzles and gets "stored" in the weapon used to deliver Spell Catch. For the duration of Spell Catch, you gain Adept Limited Improved Spell Strike. Only one spell can be stored in the weapon at a time.
Limitation: Can only be used with the stored spell and the item it is stored in.
Improvement: You are considered to have and be proficient in the stored spell for this purpose.
Trigger: You have just landed a hit with a weapon or bite attack on another creature and the effect has successfully applied.
Target takes the "on hit" effect of a conjured missile spell that you are proficient in. If the triggering hit was a critical hit, then the target takes the "on critical hit" effect instead.