[Co-op] Stop Illezra's Plot

Description

It is said that if you summon and fight the Skeleton King, the source of the power that Illezra uses, you can stop Illezra's plot.

※ You can summon the Skeleton King by going to the designated location that is marked on the map when using a summon scroll, and interacting with a specific Dark Portal.
※ If you have discarded or destroyed the summon scroll item, you can get it again from Chief Tantu at the Mausoleum.
※ You can retry the quest if you cancel it and get it again. However, you have to discard the summon scroll in order to receive the quest again.