Boshan's Current

Water swirls around you, loosely forming the shape of a turtle shell around you. This water forms a protective barrier around you. For the duration of the spell, your AC increases by 2. You gain resistance to bludgeoning, piercing, slashing, fire, thunder, force, acid, and poison damage. Ranged attacks against you are made at disadvantage. If a creature within 20 feet of you deals damage to you, you can make a spell attack against them as a reaction as a blast of water surges forth from the shell dealing 4d8 bludgeoning damage to them.