Water Shield

Using your control over water, you create a barrier between yourself and the attack. When cast, you gain +5 AC until the start of your next turn. If the attack would deal fire damage, the barrier dissipates whether the attack is blocked or not and you lose the +5 AC bonus after the attack. If the attack would deal cold damage, the spell is absorbed into the barrier, completely negating the spell. If the cold spell affects an area, then any creature within a 5 foot radius centering on you gains advantage on the saving throw.