The white fog gate represents battle, though it's not necessarily a boss; it's absolutely likely that there's an elite monster inside.
"But, why is it here?"
The adventurer froze, puzzled, and bewildered. Just a moment ago, he was marveling at seeing the legendary statue of King Gwyn of Sunlight, and before he could even fully appreciate it, he discovered that the statue disappeared when he touched it?
A classic hidden wall?
But using the Gwyn statue as a hidden wall, whose genius idea was that, aiming at people not daring to offend the gods?
If it wasn't for me running away in a panic and accidentally touching the way here...
Wait, I was just running away!
"Poof—" with a sound, a longsword pierced his chest, Solar executed him with a backstab, and his rapidly lifeless body rolled down the stairs.
"Why am I so unlucky..."
If he had a chance to make amends, he would definitely control his hands and never attack things appearing in front of him indiscriminately.