This is a summary of what danger levels are supposed to represent.
What are danger levels?
They are a summary of how dangerous a particular immortal is.
LOW
At this level, you may be able to run from the immortal should you see one. You may be able to negotiate with it to allow you to keep your life.
MEDIUM
You may be able to negotiate terms for keeping your life. There is a very high chance that the immortal will kill you if you start running.
HIGH
There is no negotiating with this one but you may be able to escape its wrath... if you are lucky enough.
EXTREMELY HIGH
You will die if you are near an immortal with this danger level. With this knowledge, you may have the time to speak your last words and say your farewells before you are disintegrated by the might of a creature beyond your understanding.