Before the Godfather started to attack 5 people on the highest floor, he went to look at the places outside of the tower.
There were many guards loitering around and it was quite hard if his people suddenly barged in and attacked them.
They could easily sound the alarm, and that might be more complicated than ever.
Thus, the Godfather went to look at some stone walls surrounding the third area, and once he's done calculating things, he started to control the crocodile-like monster's blood.
The young man wriggled his fingers and the huge amount of blood slowly flowed into different directions. Strangely, the movement didn't produce noises whatsoever.
If anything, it only sounded like water flowing in the river or something.
The reddish-black blood blended perfectly in the dim environment, so when the blood slowly condensed and formed a thin yet durable thread, no one saw it.