Elden Ring Nightreign has a boss hiding on the top of its castles and there's a trick to getting up there fast
Turns out there are bosses everywhere in Elden Ring Nightreign, including the top of the castle that is normally a pain to clear out. Reddit user Aphod posted a clip showing how to scale its walls and reach the boss sitting on top, bypassing tons of enemies on the way. I hopped into a solo run to test it and, yeah, it totally works.
The castle is always located in the center of the map unless you have a Shifting Earth event going on, and the tightening circle tends to end somewhere nearby.