Aquarius Domini

Water Form. lAquarius Domini can enter a hostile creature's space and stop there. It can move through a space as narrow as 1 inch wide without squeezing.

Freeze. If Aquarius Domini takes cold damage, it partially freezes; its speed is reduced by 20 feet until the end of its next turn.

Multiattack. The elemental makes two slam attacks.

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.

Whelm (Recharge 4–6). Each creature in the elemental's space must make a DC 15 Strength saving throw. On a failure, a target takes 13 (2d8 + 4) bludgeoning damage. If it is Large or smaller, it is also grappled (escape DC 14). Until this grapple ends, the target is restrained and unable to breathe unless it can breathe water. If the saving throw is successful, the target is pushed out of the elemental's space.

The elemental can grapple one Large creature or up to two Medium or smaller creatures at one time. At the start of each of the elemental's turns, each target grappled by it takes 13 (2d8 + 4) bludgeoning damage. A creature within 5 feet of the elemental can pull a creature or object out of it by taking an action to make a DC 14 Strength check and succeeding.

Aqueous Form

3rd-level transmutation (Sorcerer, Warlock, Wizard)

• Casting Time: 1 action
• Range: Touch
• Components: V, S, M (a bit of gauze and a sprinkling of water)
• Duration: Concentration, up to 1 hour

You transform a willing creature you touch, along with everything it's wearing and carrying, into an adhesive fluid for the duration. The spell ends if the creature drops to 0 hit points. An incorporeal creature isn't affected.

While in this form, the target's only methods of movement are a walk and climb speed of 15 feet, and a swim speed of 30 feet. The target can enter and occupy the space of another creature, and it can also move through a space as narrow as 1 inch wide without squeezing. The target can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. The target has resistance to nonmagical damage, and it has advantage on Strength, Dexterity, and Constitution saving throws.

While in this form, the target can't talk, and any objects it was carrying or holding can't be dropped, used, or otherwise interacted with. The target can't attack or cast spells.