Nature Changing Mints

Sorry if this has been suggested already, but there were 78 pages of rejected and I didn't see a good way to search to see if this had been asked. Would it be too powerful if the nature changing mints were added to this game? Could make them expensive tournament prizes or maybe new referral bonuses? Would love to be able to change the nature of hard to do things like summoned legendaries that come out shiny.

It would indeed be too powerful, as it totally nukes an aspect of the game economy.