Thunderfire

Light 'em up. – A fusion spell created by the great, the wise Enki the Slime Wizard. 

Instantly upon casting this spell an amalgamation of Flame and Bolt jumps from your hand, by using shocking grasp to infuse a fire bolt with other bolts, bolts of Lightning suckaaaaaaa!

Upon contacting an enemy this spell will deal 1d10 of fire damage and 1d8 of shock damage combined, if the target is wearing metal this attack has advantage against them.

Add another d10 and d8 per spell level taken.