Ty approached the pastor and stood before him. In his new demonic form, he towered above the pastor's kneeling form. He cracked his knuckles idly as he considered his options.
Without warning, he lashed forward, wrapping his clawed fingers around the holy cross and yanking it from the pastor's grasp. The priest recoiled and fell backward. Ty admired the craftsmanship on the crucifix for a moment before he reached down and grabbed the pastor sharply by the neck. He lifted the man entirely off of his feet, dangling him in the air just from the strength in his shoulders and arms alone. Ty leaned in closely, almost breathing directly onto the pastor's face, with their eyes meeting. "Your God has no power here," he growled. In his new demonic form, his voice rumbled deeply, echoing through the entire church. "But since you seem to be a slow learner, I'll prove it to you."
The powerful young demon dropped the pastor onto the altar and flipped him over onto his belly, with his legs dangling over the edge and his ass bared. He slashed forward with his claws, ripping part of the pastor's robes to ribbons in seconds, and then carefully parted the remaining shreds of fabric to leave the pastor bent over the altar with his nude ass presenting to anyone who cared to look. Then, leaving the pastor to quiver in fear for a moment, Ty lifted the crucifix again, studying it. He concentrated, and demonic energy flowed into the cross until it glowed bright red, shining hellish light over the pastor and demon alike. He then lowered the cross and forced the bottom end into the pastor's vulnerable ass with a small sizzle. The priest cried out in pain as his asshole stretched to accommodate the makeshift dildo. Ty was undeterred, however, and drove the cross deep to the crossbar, all while the priest twitched and struggled in vain.
Then, the power in the cross flitted to life, and the pastor's entire form became enveloped in burning red light. The power quickly shredded what remained of his robes, and began to altar his body as well. He grew shorter, thinner, and lost muscle definition. His face became clear of wrinkles, and grew rounder and softer. Small horns jutted out of his forehead, and a tail spurted out from his tailbone. It grew to a full length of maybe a foot or two, with a little heart-spaded tip. His skin grew to a shade of pale, rosy red. His hair grew darker, and most of his body hair vanished, except that of the bush around his crotch and in his armpits. His flaccid cock shrunk as well, though it didn't stay soft for long. In seconds of being surrounded by demonic power, his cock surged to life, perhaps at a full size of four, four and a half inches, and spurted precum onto the altar.
Ty smirked deviously and took a step back to admire his handiwork. The pastor had been completely transformed into a demon- but not a muscle-bound stud, like himself. Instead, he resembled a teenager, maybe in his mid to late teens. As Ty watched, the boy glanced over his shoulder to meet the other demon's eyes. Rather than rage or indignity, his gaze was alight with playful lust and excitement. The young demon let his prehensile tail curl around the cross embedded in his ass, slowly sliding it out with a long, sultry moan. When the cross dropped to the floor, the demon reached one hand around to gently spread his ass, revealing his tight pink hole for Ty to see. "Please, master," he purred, shaking his hips teasingly, "I've been naughty. What will it take for you to forgive me?"