He was thinking about the advantage that the Blood Skull sect had in terms of high end manpower as the 10 elders led the way to their entrance.
Then he began to think about how secret realms have more than one entrance. That was what was on his mind till they reached the entrance of the secret realm.
The entrance that the Blood Skull sect went to was a pond. There was an illusion and barrier array on top of the pond that prevented people from gaining access to it.
One of the elders of the Blood Skull sect used a key to open the arrays. Then the elders led the way by entering the pond.
Arthur had heard a thing or two about the entrances, so he wasn't shocked that the elders were trying to drown themselves. But he was full of anticipation to experience the process.
The 1,280 disciples followed the 10 elders into the pond. All of them used whatever means they deemed fit.
Some of them used energy shields to protect themselves from the water. But some didn't care about getting wet.
