Prism of the Radiance

A clear-cut prism shaped like a 5-sided pyramid. It is made from a reflective material best described as being between metal and glass. When exposed to direct sunlight it reflects a bright light. The prism is capable of amplifying radiant spells by storing natural light. When an attuned creature casts a radiant spell using the prism as a casting focus, a number of Magic Missile darts equal to the spell's level shoot out of the prism. The darts target the same creature as the spell. If the spell targets multiple targets, the darts will each be directed to one of the targets at random. As long as the spell hits, so will the darts. If the spell requires a saving throw instead of an attack roll, the darts hit when their target fails the save. The prism can hold up to 10 charges, consuming one charge for each Magic Missile dart fired. It does not consume a charge when used while exposed to direct sunlight. Additionally, it will regain one charge when in direct sunlight at a rate of 1 charge every half hour.