Witch Bolt (For Rowan)

For the spell's duration, you are surrounded by crackling, blue energy. Make a ranged spell attack against one creature of your choice within 30 feet of you. On a hit, the target takes 1d12 lightning damage.

On each of your turns until the spell ends, you can use your action to target the same creature or a different one. If you target a creature that you have already hit with this casting of witch bolt, you may cause the target to take 1d12 lightning damage automatically, without making an attack roll.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage dealt on a hit increases by 1d12 for each level above 1st. Additionally, the automatic damage dealt increases by 1d12 for every two slot levels above 1st.