Arcing Jolt

As you throw into the air a handful of copper dust and shavings, arcs of electricity shoot forth from your outstretched fingertips. Each creature in a 15-foot cone must make a Dexterity saving throw. A creature takes 3d6 lightning damage on a failed save, and their movement speed is reduced by half. Any creature in subsequent turns who failed their save in the turn before has disadvantage on their next saving throw against this spell.

At the start of your turn, you may choose to channel this spell by using your action. While channeling this spell, your movement speed is halved.

The electricity arcs and ignites any flammable objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the size of the cone increases by +5 feet and the damage increases by 1d6 for each slot level above 1st.