A well-analyzed instance that won't change due to the butterfly effect = navigating a crisis with ease.
The difficulty of this instance is real, with a Legendary-level Devil who loves playing mind games with people.
The Hellhound Sireon at the entrance is actually just the first checkpoint to filter out the weak.
There are various high-level bosses to follow, and generally, only those at the Golden Level can reach the deepest part, which is the castle of Devil Eugene, the Legendary Demon.
Here, he will play a game with you. If you win, you can receive a very generous reward; if you lose, you'll lose your own soul.
If it were just such a simple instance, then with the players' undying nature and numbers, plus the fact that players don't have souls, they could bankrupt him in no time.
But... this guy cheats. Every time a horde of players tries to conquer the level, after most have died, dozens to hundreds of players manage to reach the castle.
