Ring of Second Chances

Ring, rare (requires attunement)

This ring can occasionally absorb the magical energy of an unsuccessful spell, so that its power is not wasted. When you cast a spell of 5th level or lower that has no effect if the target succeeds on its saving throw, and the target's saving throw is a success, you may use your reaction to recover the spell, storing it in the ring. The spell remains stored in the ring until you use a Magic action to cast it again. This ring can only store one spell at a time.

This ring can only be used to recover a spell that has no effect on a successful saving throw (such as banishment or polymorph), and cannot be used to recover a spell that has an effect (such as dealing half damage) on a successful saving throw. If a spell has more than one target (such as slow), all of the targets must succeed on their saving throw in order to recover the spell.

Bible5e custom item. Its specific properties supplement the standard magic item rules.