DISCLAIMER: Always keep empty space in your inventory at all times, especially when you're about to receive an item, and make sure that you are not overweight. The ExperienceRO team will not be held responsible for any losses due to users' own actions. It is players' responsibility to read the Rules and Regulations and the Warnings.
After the 24-hour Endless Tower instance cooldown, the character can do another run of Endless Tower. This time, after clearing the rooftop, talking to the Lucid Crystal would have a voice teleporting you to a strange galactic environment.
If you follow the path, it will lead you to a castle where many monsters will be summoned. After all the waves of monster summons are cleared, the mysterious voice will reveal its identity. That's when we find out that all along, the creature behind the chaos is the one and only... Naght Sieger.
Note: Naght Sieger does not have a card in ExperienceRO as it is a pre-renewal server. However, you may view the renewal card here.