Barrier of water

As a reaction to incoming attack. You can conjure a barrier of water. This barrier of water will last until the spell ends or concentration is broken. The barrier will move around to effectively block incoming attacks. 

Attacks that produce heat will evaporate the barrier and deal half damage. 

Attacks that produce cold will freeze the barrier and the barrier will not dispel at the end of the duration. It will remain immobile and frozen to the ground until melted or destroyed. 

Attacks that produce electricity will pass straight through the barrier because water is conductive.

All other forms of damage will be blocked completely by the barrier.