rravenwood

Good to know, GM Joe!  According to http://towerofzenopus.blogspot.com/2012/08/old-school-champions-1st-edition-2nd.html, a similar situation exists for Adventure 1: The Island of Dr. Destroyer.  There also seem to have been multiple versions of 1e Champions itself (see this older thread that I started: http://www.herogames.com/forums/topic/88322-different-printings-of-champions-1st-edition/).

Good to know, GM Joe!  According to http://towerofzenopus.blogspot.com/2012/08/old-school-champions-1st-edition-2nd.html, a similar situation exists for Adventure 1: The Island of Dr. Destroyer.  There also seem to have been multiple versions of 1e Champions itself (see this older thread that I started: http://www.herogames.com/forums/topic/88322-different-printings-of-champions-1st-edition/).

At last, I have all the 1e stuff (click to enlarge the photos):
 

 
That GM screen was hard to find!
 
This is probably old hat to everyone else, but it was new to me: there are at least two versions of Adventure 2: Escape from Stronghold. You can easily tell which is which because the later printing is slightly smaller, causing the front cover image to have a "zoomed in" appearance if you compare the right-hand sides:
 

 
But more importantly, the newer one's booklet is stapled into the cover, and the inside of the cover is blank -- no map!
 

 
Just thought I'd mention it in case anyone else was getting into HERO System's history.

There are other trope aspects to magic besides mystery, although that is one of them. Unpredictability and consequences are two others that I can think of off the top of my head.  The former is not that magic is mysterious, necessarily, but that we don't know exactly what it will do when invoked.  The latter is that using magic either costs the caster something serious, or has other far reaching consequences.  Gandalf was reluctant to use magic for fear of giving away his position to bad guys who might be attuned to that sort of thing; Ogion refused to magic away a rainstorm for fear of not knowing how it would affect the weather elsewhere.  There is some overlap between these and mysteriousness but this way we can recapture some of the feel of magic without having to hide the mechanics from the players.
 
For the characters, of course, who can't see the game system, it's probably still incomprehensible how a wizard can incinerate an orc army just by saying something weird and wiggling his fingers.  Just like IT or auto mechanics.

I just watched CW again and honestly I feel like you saw a totally different movie than I did.

I don't own one and I've never personally seen one myself, but the PDF at this link is a scan of a 1985 Hero Games holiday mailer, and it references a limited box set of Danger International which included the regular softcover book, the older Border Crossing adventure, the classic double-sided Hero Games street map with hex grids (the same one from the Champions box sets), a poster, three dice, and a free sample copy of Adventurers Club magazine.  It doesn't seem like this "Deluxe" set of DI was ever made available through normal retail channels.  Note that the order form on the next to last page of the PDF is identical to the one found in the DI book itself, except it has been further marked up to reflect what is being offered in the mailer.

I don't own one and I've never personally seen one myself, but the PDF at this link is a scan of a 1985 Hero Games holiday mailer, and it references a limited box set of Danger International which included the regular softcover book, the older Border Crossing adventure, the classic double-sided Hero Games street map with hex grids (the same one from the Champions box sets), a poster, three dice, and a free sample copy of Adventurers Club magazine.  It doesn't seem like this "Deluxe" set of DI was ever made available through normal retail channels.  Note that the order form on the next to last page of the PDF is identical to the one found in the DI book itself, except it has been further marked up to reflect what is being offered in the mailer.

Well, if you insist....