Aerial Mer
The merfolk of old did not all die when the old world rose to the surface - the Arial Mer have adapted fins to wings - they used to thrive in the chilly depths of the ocean, now they have built their rudimentary civilizations in the cilly heights of the mountians. They live in the wrecks of their old cities and temples, now underground and in caves, and have rebuilt with blocks of ice.
Arial Mer
Air Form. The elemental can enter a hostile creature’s space and stop there. It can move through a space as narrow as 1 inch wide without squeezing.
Actions
Multiattack. The elemental makes two slam attacks.
Slam. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 ( 2d8+5 ) bludgeoning damage.
Whirlwind (Recharge 4–6). Each creature in the elemental’s space must make a DC 13 Strength saving throw. On a failure, a target takes 15 ( 3d8+2 ) bludgeoning damage and is flung up 20 feet away from the elemental in a random direction and knocked prone. If a thrown target strikes an object, such as a wall or floor, the target takes 3 ( 1d6 ) bludgeoning damage for every 10 feet it was thrown. If the target is thrown at another creature, that creature must succeed on a DC 13 Dexterity saving throw or take the same damage and be knocked prone.
If the saving throw is successful, the target takes half the bludgeoning damage and isn’t flung away or knocked prone.
The flash of a vivid fin wheels through the icy skies above you. The screech of a battle cry and the swish through the air of a trident catch your ear, and then the battle in on. Behold the Arial Mer, protectors of the Sacred Rose Octopus.
Icy regions
May I suggest an edit: Aerial, not Arial. Love you guys and this whole project!