A Solithar Ring exhibits the following properties when attuned to a creature:
Rift Step. As a bonus action, while wearing or holding the shard solitaire, you can teleport yourself, along with anything you're wearing or carrying, to an unoccupied space you can see within 30 feet of yourself.
When you use this property, you can tap into the unstable power of the stone's extradimensional rift to increase the teleport distance by up to 30 feet, but if you teleport more than 30 feet using Rift Step, you must succeed on a DC 16 Constitution saving throw or take 3d10 force damage immediately after you teleport.
Spellcasting. The ring has 6 charges and regains 1d6 expended charges daily at dawn. As an action, you can cast one of the stone's spells by expending the requisite number of charges, requiring no material components (save DC 16). The Solithar Ring can be used to cast the following spells: banishment (3 charges; the target is banished to the stone's extradimensional space for the spell's duration), mirror image (1 charge), ice storm (3 charges), simulacrum (6 charges; the duplicate created by the spell must have a significant portion of its body removed and consumed by the caster).