Arknights regularly hosts limited-time events that introduce new story chapters, unique gameplay mechanics, and exclusive rewards. These events are a primary source of Originium Prime, Orundum, event-exclusive operators, and large quantities of materials. Always prioritize participating in ongoing events.
Events typically feature an event currency that you farm from event stages, which can then be exchanged in an event shop for valuable items. Many events also include challenge stages, EX stages, and sometimes even a mini-game. Pay attention to event guides and announcements to maximize your efficiency. Often, there's a specific 'farming stage' that offers the best Sanity-to-currency ratio. Don't miss out on the free 5-star or 6-star operators often given away during major events!