Gold and shadow dragons should have a passive blinding attack, because they currently have none and are safe to attack in melee. Gold dragons’ passive could be flavored as a flash of light which hurts drow and gremlins, but this might be annoying for anyone with a pet gold dragon and getting blinded all the time as it fights monsters.

Variants that give Croesus armor made of gold should also have a small chance that his body armor is replaced with gold dragon scale mail.

Leprechauns have a one-way grudge against gold golems and gold dragons.

Gold dragon armor’s light radius is increased by 1 if its enchantment is above some amount such as +5.