Elemental Energies

You bolster yourself with the energies of the elements. Pick water, fire, earth, or air.

• Water: You gain a swim speed equal to your walking speed and whenever you take cold damage, the damage you take is halved. In addition, when a creature attacks you you may use a reaction to jet water at the creature. Make a ranged attack (range of 15 feet). On a hit, the target takes 2d6 bludgeoning damage (this increases by 2d6 for each spell level above the 3rd) and is pushed back 10 feet. 
• Fire: Whenever you take fire damage, the damage you take is halved and all your weapons deal an extra 2d6 fire damage (this increases by 2d6 for each spell level above the 3rd). In addition, 5 times per casting you may use an action to unleash a 100 foot long ray of fire. All targets in the fire's line take 8d8 fire damage (dexterity save for half damage) (this increases by 2d8 for each spell level above the 3rd).
• Earth: You gain a climb speed equal to your walking speed and whenever you take poison damage, the damage you take is halved. In addition, 5 times per casting you may cause the earth to erupt in jets of dirt and rock. All creatures within 30 feet of you take 3d10 bludgeoning damage (dexterity save for half damage) (this increases by 2d10 for each spell level above the 3rd) and the area becomes difficult terrain.
• Air: You gain a fly speed equal to your walking speed and whenever you take lightning damage, the damage you take is halved. In addition, 5 times per casting you can create a blast of stormy clouds. All creatures in a 50 foot cone of you (you pick the direction) take 5d8 thunder damage and 5d8 lightning damage (dexterity save for half damage) (these damages increase by 2d8 for each spell level above the 3rd).