Danger Crossing, or as others liked to call it, Dungeon Crossing, was when a party or group of Knights on a Den raid are sabotaged and 'crossed' by another group by leading to them a swarm of monsters, or a particularly horrid abomination.
It was like getting others involved in their predicament, and in most cases, the victim party tended ti he the one to deal with the aftermath. The culprits instead, would quickly self for safety.
Dungeon crossing was considered an unspoken taboo amongst Knights, and it was also somewhat judged as a crime.
It wasn't a common occurrence, but neither was it rare.
It was for his reason, to prevent such situations, that only a single registered group or party were allowed to venture down one Den. And throughout all of it, no other group will be allowed to raid the same Den until it was over.
That way, it was practically impossible, a nonexistent chance for a Dungeon Crossing to occur.
But.