Amulet of Elemental Manifestation

The amulet has 7 charges.  It regains 1d4 + 3 expended charges each day at dawn.  While you are attuned to it and are wearing it, you can use an action to cast one of the following spells from it: wall of sand (expends 2 charges), wind wall (expends 2 charges),  wall of water (expends 2 charges), elemental weapon (expends 3 charges) or wall of fire (expends 4 charges).  You do not need to supply material components for these spells, but you must maintain concentration on them.