Your Constitution score increases by 2 and one other ability increases by 1.

You are resistant to acid, you know the acid splash cantrip, and twice a day you can add acid 1d4 damage to a melee attack you make. This increases with levels, at level 5 to d6, at level 10 to d8, at level 15 to d10.

In addition to your sight, you gain blindsight of 20 ft.

You have darkvision as well.

You can extend/elast each limb up to 10ft even though you have bones. Your bones are flexible and you take half of the fall damage.

You take half of bleeding damage due to jelly blood, and you can reattach limbs that were cut/slow regeneration.

You take 1d6 necrotic damage each time you are on water on every turn.