When the black snake reached the fourth snake, it began to draw a large amount of spiritual energy from them. It used the spiritual energy to grow stronger and larger.
Legion provided it as much spiritual energy as it wanted. This happened to be 40 units of spiritual energy.
The black snake expanded into a giant snake as it grew stronger. After gulping up 40 units of spiritual energy, the snake collapsed into a ball of flesh.
Legion sighed in relief and said, "It is done."
A lot of this process has been different from what they knew. It is all because they took a different approach.
Usually, the mark of bondage is placed on the body. So when it is time for it to fuse with the slave, the mark behaves like divine flesh and is assimilated by the slave through their body.
They thought that the process was going to fail because they invaded Black Knife's existence through his mind. But everything turned out well. They know this because they can now see through Black Knife's eyes.
