The nightmare crumpled under the heat and the force of the attack. A sizable chunk of its body was burned away on impact and many of its tentacles were severed. With an inhuman wail, the creature lurched backwards, trying to escape the flames, but it couldn't escape the fire-bearing child of magic. More of its flesh and limbs were burned away. The creature screamed from every mouth on its body and lurched backwards again, falling over the edge of the precipice into the darkness. Several of its severed tentacles remained behind, smoldering and twitching. The whole plateau was filled with a horrible stench, something like the smell of boiling vomit, but the nightmare was gone.
Maybe gone forever.