Rimuru's Crossover: From the Start, He Devoured Keyaru

A modern man suddenly transmigrates to a crossover world containing ninjas, pirates, demon kings, heroes, undead, Soul Masters, Battle Practitioners, Saiyans, and more. Our protagonist transmigrates into Rimuru the Slime and gains the unique skill Perfect Mimicry. Combined with the Predator skill Rimuru already possessed, it lets him perfectly imitate the appearance of anything he devours while it was alive. And from the start, Rimuru devours the Healing Hero Keara, gaining the unique skills Healing, Copying, Optimization, Degradation, and Plunder.

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.