Amulet of Ritual Storing

As an action, you can cause the amulet to begin casting a ritual spell that is known to you. When the amulet is casting the ritual, it takes the normal amount of time that it would take to cast the ritual (Casting time + 10 minutes). Once this time is completed, the Amulet holds the spell until it is released by using an action to cast the spell instantaneously. Alternatively, you can dismiss the spell in the amulet as an action causing the spell to be wasted and the amulet to be emptied. Any costly components must be within 5 feet of the amulet or else the spell fails when cast. 

Once this ability has been used to successfully cast a spell, it cannot be used again until next dawn.

Notes: Ritual Caster