It will take forever for the ghouls to reach him at their current speed. They won't be dangerous that way. He was a little disappointed by it. He expected them to be dangerous. But if they can't threaten him then they won't be of much use to him.
But he knows that they are more than they seem. He has never seen one. Not even Gehaldirah has seen one. Legion has only heard tales of them. Their origin is tied to Vampires. Where there are vampires, there are ghouls. They are supposed to be very dangerous.
If ghouls aren't dangerous, then no one would have gone to great lengths to seal them within this space. Even the fountain of life created a barrier to hide them and it warned him against releasing them. He also wouldn't feel a faint sense of existential dread from them despite how slow they are. So he still has high hopes for them.
"Let's see what makes you guys special." He said.