I spent lots of hours grinding coco and wood to get my Derek to 10,000 health and strength. I complete the infinite monster dungeon and nothing cool happens. I decide to casually talk to Remouladin and go to Burgulon. Right before that, I see a new button, I click it and enter Derekulus X. After I finish the dungeon, I have two options:loot the room and enter the door. I choose to loot the room and get 3 worm cubes. Then when I try to open the door, it doesn't work.(edited)