Darvin's Aqueous Appendages

Upon casting, water begins to form from the material components, swirling and spinning in a corkscrew pattern around the caster's upper extremities - eventually solidifying into two tentacle like appendages. They are translucent and the caster's arms (if applicable) are able to be seen in a distorted image inside of the water. The Tentacles operate normally, just as hands and arms would, allowing for usage of your Spellcasting modifier as opposed to Strength for Strength checks in the duration.

While the spell is active, the watery appendages begin to wave and move on their own, as if there is a minor current in the air. any unarmed attacks with the Tentacles have the Reach property up to 15ft, and instead do 1d8 Cold Damage on a hit. Similarly to when making an attack with a Light Melee Weapon, after making an attack with the Tentacles, you may also use your Bonus action to make another attack against any target.

When an attack lands on a target, you may do one of three things

Constrict:  If a target is Large or smaller, they make a DEX Saving Throw. On a fail, the watery appendage begins to wrap around the target, squeezing air out of them and prohibiting movement, grappling them. While a target is grappled in this way, you are unable to make attacks against other targets with the grappling Tentacle, until the grapple is released. 

Anchored Pull: The Tentacle reaches outward, and the tip becomes a frigid spike of ice, penetrating into a target. The target makes a STR Saving Throw, and if the target is a stationary object such as a wall or barricade, anything rooted to the ground, it automatically fails. On a fail and if the target is Medium or smaller, the target is pulled 10 feet towards you. if the target is Large or bigger, you are pulled the entire range towards the target. This DOES provoke attacks of opportunity.

Deluge: One of the Tentacles becomes a torrent of rushing water, and uses latent energy built up and expelling it on a target. The target makes a STR Saving Throw. On a fail, water pushes into them at extremely high pressure, no matter where they are in your range - they are knocked 10 feet backward