Runaway

Nergulum is know for it's bad reputation as a no man's land and generally a bad place to be. People rarely want to travel there from their own free will. But that reputation has it's merits. For example, if you were a person who is, for one reason or another, on the run then it would be the perfect place to hide. Only the truly reckless  and obsessed would chase someone into Nergulum, for entering it could mean certain death or eternal imprisonment. You were someone that chose that as a worthy risk.

On the run

When you take the dash action, all enemies have disadvantage on opportunity attacks against you and all physical damage received from opportunity attacks is halved. This effect last until the end of your turn.