Crawling Lightning

You create a small orb of concentrated electrical energy that appears to cling to a surface like a many-limbed spider. The orb appears on a wall, floor, ceiling or similar surface in an unoccupied space of your choice within range. It lasts for the duration. It sheds dim light in a 20-foot radius. As a bonus action, you can move the orb up to 30 feet. The orb can cling to any solid surface, allowing it to climb sheer walls or dangle from ceilings. It can move through other creatures' spaces but must not end its movement inside a creature's space. The spell ends if the orb is submerged in water. When you move the orb, it attacks the creature whose space it moves through first. A creature is also attacked if it starts its turn in the orb's space or when it moves into the orb's space for the first time on a turn. The orb uses your spell attack bonus, and inflicts 3d6 lightning damage on a hit. It has advantage on attack rolls against creatures wearing armor made of metal.

At Higher Levels: When you cast this spell using a 2nd level spell slot or higher, the damage increases by 1d6 for each slot level above 1st.