The Shadow Keep is the third dungeon in Elden Ring: Shadow of the Erdtree. It features two boss fights, with the final boss, Messmer the Impaler, being one of the most challenging encounters in the DLC. Like Belurat and Tower Settlement, navigating the Shadow Keep involves complex pathways that players must figure out how to navigate. This intricate layout often leaves players frustrated and disoriented, resulting in frequent backtracking without proper guidance.

https://screenrant.com/elden-ring-shadow-erdtree-shadow-keep-walkthrough-guide/