Gem of Brightness

This prism has 50 charges. While you are holding it, you can speak one of three command words to cause one of the following effects:

• The first command word can be used as a bonus action to cause the gem to shed bright light in a 30-foot radius and dim light for an additional 30 feet. This effect doesn’t expend any charges and lasts until you repeat the first command word or use one of the other two.
• The second command word requires an action and expends 1 charge, causing the gem to fire a brilliant beam of light at one creature you can see within 60 feet. The creature makes a DC 15 Constitution saving throw or becomes blinded for 1 minute. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
• The third command word requires an action and expends 5 charges, causing the gem to flare with blinding light in a 30-foot cone. Each creature in the area makes a DC 15 Constitution saving throw or becomes blinded for 1 minute. A blinded creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

When all of the gem’s charges are expended it loses all magical properties, becoming a mundane jewel worth 50 gold.