Elemental Whip

You channel the powers of nature through your casting focus causing elemental forces to string from your focus in a whip-like shape. For one minute you gain a whip that deals 1d8 + your spell casting ability modifier in the damage relevant to the whip, has a range of 20ft, and can be used on each of your turns as a bonus action. You gain additional benefits based on the whip you chose.

Lightning whip: The whip takes on the form of a crackling, flowing lightning bolt that constantly arcs and bounces off the ground to the nearest conductive object or surface. Any creature hit with this whip must make a Constitution saving throw. Creatures wearing metal armor have disadvantage on the saving throw. On a failure the creature is unable to take reactions until the start of the creatures next turn.

Cold whip: The whip takes on the form of flowing water, constantly freezing and melting, forming a near ghostly formed whip of pure wintery wraith. Any creature hit with this whip must make a Constitution saving throw or have their speed halved until the start of the creature's next turn.

Fire whip: The Whip takes on the form of a tendril of controlled raging flames that burns and blazes deep into the surface of any object it touches, it glows a bright red shedding light within 5ft from itself. Any creature hit by this whip must make a constitution saving throw. Plants have disadvantage vs this saving throw. On a failed save they take an additional 1d8 fire damage.

At higher levels: When you cast this spell using a 3rd- or 4th-level spell slot, the damage increases to 2d8. When you cast it using a 5th- or 6th-level spell slot, the damage increases to 3d8. When you cast it using a spell slot of 7th level or higher, the damage increases to 4d8.