I am not your enemy

Law's irises went wide, but he couldn't dwell on it for now. He hurriedly looked ahead, finding a spot to land safely. The second his foot touched the roof and got his balance back, he looked down once again. 

Much to his surprise, as soon as his gaze landed on where his father was, Samael was already there. The layer of darkness that covered him and the undead earlier was gone. All there was… was Samael, no one else, in that pool of blood on the ground. 

"Father…" Law's eyes shook, searching for any undead in the area. But alas… they all disappeared. 

His heart thudded against his chest, holding his breath in horror. How was this possible? Just now, this area was full of undead. Thanks to his regular training and sparring, Law was able to last this long. However, his father… it hadn't even been fifteen seconds since, but Samael cleared the area.