http://www.pcgamer.com/total-war-warhammer-2-reveals-free-skaven-themed-update-out-this-week/

Since launch in September, Total War: Warhammer 2 has given us plenty to write about. Creative Assembly and Sega have now unveiled The Laboratory—a free Skaven-themed update that looks as silly as it does brilliant. It's due next week.

Before we look at The Laboratory's announcement trailer, note the disclaimer at the start of the video. It reads: "Any PC can attempt to use Laboratory Mode, but your performance will vary wildly."