You can breathe air and water.

You see in dim light within 60 feet of you as if it were bright light and in darkness as if it were dim light (colors in this darkness are seen as shades of gray).

You begin play with proficiency in a musical instrument of your choice.

You know the thaumaturgy cantrip.

Grims can speak Common and one other language of your choice.

Choose an Ability Score to increase by 2 and another to increase by 1.

After each long rest you decide whether you are driven by cruelty or hope. Hopeful grims have the musician features. Cruel grims embrace their bloodthirsty side and have the lurker features. You lose the benefits of the previous drive when you change drives. If you forget to declare your drive, you have the lurker features.

Musician
The songs of the forest, the wind, and the waters fill your soul, and you want nothing more than to frolic beneath the waves, sing, or play music on any nearby instrument.

Natural Swimmer. Your swimming speed becomes equal to your walking speed.

Sweet Voice. You have advantage when making any Charisma (Performance) check.

Share the Music. As an action you may grant one willing creature proficiency with a musical instrument of your choice (even if you do not have proficiency with that instrument). You also extend your innate ability to survive underwater to the target (they gain your Amphibious trait). These features end after one hour, or if you end this trait early by using a bonus action.

Nudge the Audience. Starting at 3rd level, you can cast the sleep spell with this trait. Starting at 5th level, you can also cast the suggestion spell. Neither sleep nor suggestion require a material component when you cast them. Once you cast either spell you cannot cast that same spell again until you complete a long rest. You may also cast either spell using any spell slots you have of the appropriate level. Intelligence or Wisdom is your spellcasting ability for these spells (choose when you select this race).

Lurker
You fear for the beauty and grace of the natural world. Others want to destroy what you love but those that try, will suffer for it.

Ambusher. Your climbing speed becomes equal to your walking speed and your jump distance is doubled. You have advantage when making Stealth checks while underwater. You also have advantage on Stealth checks while on land, as long as you do not move after hiding.

Inflict Harm. Once per turn when you hit an opponent with a weapon or an unarmed strike you may inflict extra damage of the type indicated by the weapon equal to your proficiency bonus.

Murky Depths. Starting at 3rd level, you can cast the fog cloud spell with this trait. Starting at 5th level, you can also cast the invisibility spell without requiring verbal, somatic, or material components. Once you cast either spell you cannot cast that same spell again until you complete a long rest. You may also cast either spell using any spell slots you have of the appropriate level. Intelligence or Wisdom is your spellcasting ability for these spells (choose when you select this race).