I had a idea to make a creature that can blend in with his prey by "being a wolf in sheep's clothing", The Fusetsu's outer body looks exactly like it's most favorite prey, the Akish, which are medium sized horse-like creatures. The Fusetsu hides it's real head inside it's body and controls the outer head and body, sorta like a puppet master with it's puppets, and tries to blend in with a herd of Akish, the Akish have no idea since the Fusetsu look, act, and even smell jut like one of them. When the timing is finally right the Fusetsu opens the trap door-like neck and lunges out at it's victim with it's powerful jaw and strong tentacles, this happens so quickly the Akish herd has no idea what hit them and panics. After the Fusetsu is finished feasting on its kill, it'll find a different herd to blend in with and take it's time for setting up it's next attack.The Fusetsu can also use their disguise to attack other creatures, since Akish are pretty docile creatures no other animal would expect a attack from them, so the Fusetsu take advantage of that. The Fusetsu are truly are masters at blending in it their environment.