The Leopard ran after Grey who had already passed through the opening.
Grey was welcomed by a large cave, but he could tell that it was very spacious the further he walked in. It was as if there was an entire city hidden in the mountain. To be honest, this wasn't the first time he was seeing something like this, but this was probably the first time he was seeing one used by Magical Beasts. There was a pathway that led further into the cave, and just as he was about to start the journey into the cave, he caught sight of the Leopard running after him.
"Don't bug me, don't think I won't kill you."