Dragon Lightning

A bolt of lightning is summoned around your hand and shoots out at your target. Make a ranged spell attack. You have advantage on the attack roll if the target is wearing armor made of metal. On a hit, the target takes 2d12 lightning damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d12 for each slot level above 1st.