The Hadar

Creature Type: You are an aberration   Size: Medium or Small   Speed: 30ft, Climb speed equal to walk speed   Gift of the Hadar: Once you are 3rd level you can cast Arms of Hadar once per long rest, at 5th level you can cast Hunger of Hadar once per long rest. You also know the Eldritch Blast cantrip with the Grasp of Hadar warlock invocation. You can also cast these spells using spell slots you have of the appropriate level. Intelligence, Wisdom, or Charisma is your spellcasting ability for these spells when you cast them with this trait (choose when you select this race).   Abyssal Body: You have resistance against cold damage. If you already have resistance to cold damage from another source, you instead have immunity to cold damage. If you already have immunity to cold damage from another source, whenever you are subjected to cold damage, you take none of that damage and regain a number of hit points equal to half the damage dealt of that type.   Hungering Tendrils: As a bonus action, you can cause tendrils to sprout from your body for 1 minute. During that minute, you can use your bonus action to target one creature within 10ft and make a melee attack which counts as a simple melee weapon with which you are proficient. You add your Constitution modifier, instead of your Strength modifier, to the attack and damage rolls when you attack with this tendril. It deals 1d6 cold damage on a hit. Creatures hit by this attack cannot take a reaction until the start of your next turn. This trait's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).   You can use this trait a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.