You send an unstable bolt of chaotic arcane energy hurling at one creature in range. Make a ranged spell attack against the target. On a hit, roll a d4 until you roll a 1 three times. The number of dice rolled this way is the damage this spell deals. Then, roll 1d6. The number rolled on that die determines the damage type, as shown below.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the die rolled is instead a d8. Using 5th level or higher, a d12. Using 7th level or higher, a d20.