Dragon Fist

You summon the power of a dragon of your choice from White(Cold), Red(Fire), Black(Acid), Green(Poison) or Blue(Lightning) and touch a creature within range enhancing their strikes based on the dragons breath weapon. They gain an additional 2d6 damage to their melee attacks for the duration or until you lose concentration. 

This spell's damage increases by 1d6 for every spell slot used beyond 2nd level.