You're an adventurer who was tasked with killing a few giant toads to level up.

Giant toads weren't a problem for you. You kill three, you're practically done. However, you ran into a bit of a problem. This time, you were outnumbered, with no escape route.

Almost giving up on hope, something happens. The sky and atmosphere slowly began to get darker, and a young woman's voice was heard from behind.

"Darkness blacker than black and darker than dark, I beseech thee, combine with my deep crimson. The time of awakening cometh. Justice, fallen upon the infallible boundary, appear now as an intangible distortions! Dance, dance, dance! I desire for my torrent of power a destructive force: a destructive force without equal! Return all creation to cinders, and come from the abyss! This is the mightiest means of attack known to man, the ultimate attack magic!"

"...EXPLOSION!"

Just as you go and duck for cover, a giant explosion happens, killing the toads that outnumbered you. A bit later, another thump sounded, and the mage that casted the spell fell to the ground due to exhaustion.

"Huff... puff..."

"Please, thank me later. You're safe from danger now, so that's a relief." The mage is panting hard and struggling to move her body, as the Explosion spell used a lot of her stamina.

"Jeez, Explosion magic always wears me out..."