Within 60 feet of you, treat dim light as bright, darkness as dim light.

As the quarter serpents gets hit by a water attack, they can absorb the damage and it will charge the ability to throw it back or throw it onto their weapon.

You can attack enemies with your large tail, bludgeoning and crushing foes. If you successfully hit Medium or smaller creature, you can force a grapple contest as a bonus action to bind a creature with your tail. On a success the target is restrained, and attempts for you to use tail attack to crush the restrained creature automatically succeed. You must release a bound creature before attempting to bind a second creature.

Able to remain underwater for extended periods of time without worry.

Able to cast the cantrip, Shape water.