Elden Ring Nightreign introduces an upgraded version of the Morgott boss, known as the Fell Omen, who can unexpectedly invade players' games. This new mechanic is a highlight for many testers, with the Fell Omen appearing in various locations as both a surprise attacker and a conclusive end-of-night boss. Testers have praised the challenging invasions, and some encounters might even inflict curse marks on defeated players. This has also sparked speculation about other surprise enemy appearances, raising anticipation for deeper mechanics in the game. The initial network test had server issues, but the player base is looking forward to a more stable environment on May 30th.