"I now have four of these stones, have taken down all the Goblin Kings, have improved my combat capabilities and should be able to take down the rest of the Goblin Beasts easily. It will take quite a while to do so, but it is doable and I will leave that to my summons. For now, I should focus on exploring the castle and finding out whether these stones have something to do with the castle" decided Adam.
He had done so much battle and was confident in his capability against all the goblin beasts that were left after taking down all of the Goblin Kings in long, arduous battles, but it was time to begin investigating and exploring the castle.
Since the castle seemed to be indestructible, Adam wouldn't be able to break out if he was trapped or caught by something, so he was being very careful as he approached the entrance of the giant castle.