Dungeons require guild permission to guild

You must be a certain guild lvl for certain Dungeons and dungeon levels

You can-not die in a dungeon, your corpse is brought to the church by collectors*quest hint* to be revived.

You must make it to the dungeon lvl boss to be able to save your progress in the dungeon.

Dungeons change and reshape consistently so unless you have a clear guide or map it's not recommended to explore carelessly

When entry into a dungeon for a quest, a thread is made on that lvl, you must have another person acting as the Game Master or NPC they control the dungeon environment, details, enemies, you'll control the character and his actions.