Your Intelligence score increases by 2 and your Wisdom score increases by 1

Your size is medium

You have a flying (Hover) speed of 20 ft.

Your unarmed strikes deal 3 plus your strength modifier bludgeoning damage on a unarmed strike

You are unable to possess weapons that require to be held. However, you can use your telekinesis to make any single object within 60 feet of you to move at your will

You can see in dim light within 120 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

Once per day, you may use the spell "Prismatic Spray". You may cast spells as though you were using a magic focus, even if you are not doing so. Intelligence is your spellcasting ability for these spells.

The beholder is a lawful evil

Nobody knows how long beholders live, but rumors have it Xanathar the beholder is 2,000 years old (They live up to 5,000 years).

You know common and deep speech