[2019] Silvthril chains now only require a silver bar to make BTW

Originally posted by RSPatd

I don't know whether or not this is intended but if you're low level crafting or an ironman, this change benefits you. These chains give 100 experience per bar when made.

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Previously before the M&S rework they took a silver bar and a mithril bar to create, but it now only requires a silver bar. https://imgur.com/yM910vc