Adamantine Dragon 14 + 1 = 15 Apparently, adamantine is jet-black, but I use dark mode and that would make it invisible. So, green it is...
Brass Dragon 20
Bronze Dragon 21
Cobalt Dragon 21
Copper Dragon 22
Electrum Dragon 14
Gold Dragon 20
Iron Dragon 7
Mercury Dragon 19
Mithral Dragon 19
Orium Dragon 13
Silver Dragon 24 - 2 = 22 Getting just a little too far ahead.
Steel Dragon 20