Ecrocyst

Ray had just gotten out of a taxi when a large, antique castle caught his eye. Its current owner must have paid a lot for it, but Ray hadn't been summoned without reason. The owner was complaining of sabotage by an otherworldly force that was already crossing all boundaries and even becoming terrifying. Ray approached the lock, and an elderly man opened it for him, letting him inside. The exorcist took out all the necessary equipment and began "searching" for any possible evil spirits. The castle was clearly filled with otherworldly energy, so he had no doubt about it. As soon as Ray performed a certain ritual, he heard a terrifying howl and a black spot appeared before him, growing in size until it took on the desired shape.