As for the Runic restriction, its all up to the luck as they are a very high level that very few people could solve them.
It is said that this ruin was a high-level one but with the time level of Ruins regressed that it had become the lowest one.
So, despite most of these restrictions had withered with the time, there are still many that are partially active and suddenly get activated and kill a lot of people in the process if they are lethal type.
The one thing I found most dangerous about this ruin is that its unexplored, it is said that is ruin is not even explored a half and the reason that it had only appeared two times ever, which is really less time to completly explore ruin like this.
As I read it, I make a note of areas that I want to explore and the ones I want to avoid. There are many areas which are out of my League and need high strength, those who venture there without having enough strength die without knowing how.
