Blast Rod

You weave raw arcane force into an iron rod and then store its energy, saving its destructive force to be used for a future time. You store 6d8 dice within the rod, which you can focus on a single blast or divide among several targets. You can also give this rod to another creature to use, as long as their intelligence is 6 or higher.

To use the rod, you designate how many dice of damage you wish to release, then make a spell attack, using the caster's spell attack bonus, as an action against any target within 60 feet. On a hit, you deal an amount of force damage equal to the amount of dice spent. Regardless of whether the attack hits or not, the damage dice you specified are subtracted from the total stored in the rod.

At Higher Levels. If you cast this spell using a spell slot of 4th level or higher, you can store an additional 1d8 dice for each slot above 3rd.