Volcano Explosion

"Oh, roaring flames that dispel darkness & blackness!
Oh, scorching heat that travels through destruction & chaos,
I summon your powers under our eternal contract.
With your violent breath overflowing from the rift of this world,
Shake the earth, fill the sky, & expel the enemy in front of me!"

You blast a rising burst of molten rocks in a 49 ft/15 m radius centered on you.
10d12 fire damage, you are unharmed while targets are stunned.