The Caeruleum gain a +2 to their Intelligence and a +1 to their Charisma modifiers.

Caeruleum mature slower than humans do, reaching maturity around age 40. Their life span is typically 350 years, with some living to the age of 500.

Caeruleum are usually lawful and non-evil.

Tall and slender, Caeruleum stand 6 to 6½ feet tall on average and usually weigh less than 200 pounds. Your size is Medium.

Your base walking speed is 30 feet.

You have advantage on all Intelligence, Wisdom, and Charisma saving throws.

You are proficient in one of the following skills of your choice: Arcana, History, Investigation, Medicine, Performance, or Sleight of Hand. You are also proficient with one tool of your choice.

Whenever you make an ability check with the chosen skill or tool, roll a d4, and add the number rolled to the check’s total.

By absorbing oxygen through your skin, you can breathe underwater for up to 1 hour. Once you’ve reached that limit, you can’t use this trait again until you finish a long rest.

Your natural form is a mixture between your amphibian skin with the looks of a taller half-elf. You can Concentrate on changing your blue skin-colour to the skin-colour of your elven parent, this works exactly the same as Concentrating on a spell. Once you concentrate on something else, you will no longer be able to maintain the transformation.

You have advantage on saving throws against being charmed, and magic can’t put you to sleep.

Thanks to your elf blood, 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 are proficient in Elvish, Common, Vedalken, and another language of your choice.