I am trying to create a monk that has a Rope Dart as his ranged weapon. What I am trying to understand, specifically in the Special Materials section, is how much is the cost to have it made into, for example, Elysian Bronze and Mithral. It is not an ammunition, so would it cost 1000 gp to change it to Elysian Bronze? Moreover, because it has no weight whatsoever, how would the cost be applied to the cost of making it Mithril?
