Jacob's heart raced as he stumbled upon an ancient tome in his grandfather's attic. The pages were yellowed and brittle, filled with symbols he couldn't decipher. On a whim, he read aloud the incantation, expecting nothing to happen. However, suddenly, the room shook and a portal opened, revealing a hulking demon.
Jacob fell to the ground in astonishment, realizing the gravity of his actions. The demon towered over him, grinning wickedly. "Don't worry you shall be rewarded for your kindness," he said, reaching out to touch Jacob's hand, filling him with a strange energy.
Pain shot through Jacob as his body began to rapidly swell and grow bigger right before his eyes, his arms bulged with new muscle, tearing through his shirt, his legs thickened, pants straining at the seams and below... his crotch swelled grotesquely large and the demon relished in all of his growth