Eight Arms of the Tide

When you cast this spell you conjure forth an octopus-shaped avatar of water to encircle you, granting you a slew of powerful abilities. You gain the follow benefits until the spell ends:

• You become reactive, granting you a reaction during every turn in a given round of combat. 
• You can use your reaction to deflect attacks against you, provided you can see the weapon or spell doing so. When you use this reaction, you add your proficiency bonus to your AC.
• As an action you can make a melee spell attack with each of the arms of water out to a range of 15 feet. Each tentacle deals 1d8 + your casting modifier as bludgeoning damage.
• If you strike a creature, choose whether or not the tentacle latches on. They become restrained, and you cannot use that tentacle to attack until it is no longer restraining a target. Restrained creatures can make a Strength check to escape your grasp.
• Creatures of your choice within 15 feet of you have their movement speed halved.