Amulet of Spell Reflection

This amulet has 10 spell slots. Using a reaction, you may choose to absorb a spell that you can see being cast within 30 feet of you. You must make a spellcasting ability check to succeed, the DC being 10 + the level of the spell cast. On a success, that spell is successfully stored in the amulet. The level of the spell determines how many slots are taken up. Cantrips take up one slot. Within the next minute, you may use your action to cast that same spell yourself. The spell attack bonus or spell save DC, if applicable, would be your own.