Reaching the King's castle was no easy task. At least getting past the guards that was. Last time Quinn had come here, it had been in the midst of a council meeting. At the time, he also had Arthur by his side, and the guards had been less cautious.
However, this time, there were several checks put on Quinn before he was even allowed to step in. They didn't allow any weapons nor any armour past the entrance. Everything had to be left before he could enter. Not that it mattered much in Quinn's case since he kept all of his important stuff in his dimensional space.
If he ever needed something, he could equip it with Shadow equip at any time. The reason why Quinn wasn't wearing his armour or weapons out in the open in the Vampire World was due to what substances they had in them.
Before coming here, Quinn had asked Alex to create weapons using his blood, not just for him, but also for the others from the Cursed faction. Similarly, everyone else was also hiding them in their shadow.