Your Intelligence score increases by 1, and your Charisma score increases by 2.

Half-Abyss mature at the same rate as humans but live a few years longer.

Half-Abyss are about the same size and build as humans. Your size is Medium.

Your base walking speed is 30 feet. You gain a swimming speed of 30 feet.

Thanks to your abyssal heritage, you have superior vision in dark and dim conditions. You can see in dim light within 60 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.

You have resistance to cold damage.

You know the shape water cantrip and the ice knife. When you reach 3rd level, you can cast the [Tooltip Not Found] spell as a 2nd-level spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the sleet storm spell once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.

You can speak, read, and write Common and Abyssal.