[quote=@Double]
If there's any kind of threat in or around Death Mountain, wouldn't Argon already be aware of it? Hell, he had to climb down [b]from[/b] Death Mountain so logically he could have seen or even encountered whatever the danger was if only briefly.
[/quote]

Not exactly, Death Mountain [u]Range[/u] in this Hyrule, Death Mountain is the largest in a range of mountains named after it.

I feel I should note that we were going to have a map, but there were complications and we didn't. Just ask me (or the characters) about any geography questions.