Theres the Muddy Ground card you were referring to at first.
And here is the Stand Your Ground card.
As stupid as it is, Bronze and Copper refer to the SAME color. Idk why it'd say "bronz" instead of bronze, but that's what it means. We have GOLD, SILVER, and BRONZE/COPPER. That's it.
I guess they never intended to make a "Silver Launcher" but then why would they call the same color two different things you know?