From Press Release:
Today, Amazon Games is launching Lost Ark’s “Battle for the Throne of Chaos” April update! The new update will include the Glaivier, a new advanced class for the Martial Artist. Players will also get to explore a new continent called South Vern, participate in all-new progression events, get access to new skins and much more.
Full patch notes can be found here: https://www.playlostark.com/en-us/news/articles/april-2022-release-notes