Your constitution score increases by 2  and your charisma or  intelligence score increases by 1

 Beholder spawn mature around 80 and live for 620 years 

Most beholder Spawn are neutral in some form although there have been quite a few notorious evil beholder Spawn as well as has quite a few famous good beholder spawn they range in alignment as much as humans

You can speak read and write common undercommon and deep speech

As an action You shoot magical eye rays at one creature you can see within 90 feet you can use your eye rays a number of times equal to your charisma or intelligence modifier which ever is higher your DC for your Eye rays equals 8+ your proficiency bonus + your charisma or intelligence modifier whichever is higher

1)  confusion ray. The target must succeed on a wisdom saving throw or can't take reactions until the end of its next turn. On its next turn  The target can't move and uses its action to make a melee or ranged attack against a randomly determined creature within range. if the Target can't attack it does nothing on its turn. 

2) paralyzing ray. The Target must succeed on a constitution saving throw or be paralyzed for 1 minute The target can repeat the saving throw at the end of each of it's turns ending the effect on itself on a success 

3) fear ray  The target must succeed on a wisdom saving throw or be frightened for 1 minute  The target can repeat the saving throw at the end  each of its turns with disadvantage if the beholder Spawn is visible to the target ending the effect on itself on a success

4)  wounding ray. The target must make a constitution saving throw taking 16 (3d10)  necrotic damage on a failed save  or half as much damage on a successful one 

Thanks your beholder ancestry you have dark vision up to 60 feet

You can cast the find familiar spell once per long rest but it must be a gazer at 3rd level you can cast the levitate spell using this trait at fifth level you can cast the fear spell using this trait