Arcane Crystal of Echoing Power, +1

Arcane Crystals are a further refinement of an Arcane Focus, serving to help the wielder amplify a particular aspect of the magical power they channel. Arcane Crystals do not require an attunement slot, but you can only equip a maximum of one Arcane Crystal equipped at any one time.

This Arcane Crystal has two charges, which reset on a long rest. As a free action, you may expend a charge to choose a spell of 2nd level or lower that you have already cast this turn, and instantly cast a duplicate of that spell, without expending any spell slots. You may choose new target(s) if applicable.