Rare Enemies

I’d like to see a different variation of each monster that is only slightly different and is very rare. It would kind of be like a useful genetic mutation, like a goblin being 2 feet taller or something like that. Also the material (s) they drop are better than the ones they normally drop, the exchange being that they are stronger and harder to fight. The material doesn’t need to be different, it could just give like +3 extra strength or something when it’s made into gear, as opposed to the regular version. (Also I think Exotic enemies makes more sense as a name, but it sounds more boujee).