> One siege group I've been idly thinking of is a unit of huge
> glass, crystal and mirror "engines" that take the power of
> the sun and direct it against the walls of an enemy fortress
Sun County produced them as anti-dragon defences a long time ago.
http://members.ozemail.com.au/~mrmob/goldengun.htm#The Origins
OK, they *say* they were just heliograph stations, but we know better!
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