The Expanse

I would like to see Hiryu's and Cu Sidhe's spawn in really pretty colors but not all the time, it should be a rare thing to watch for. 

They do spawn in rare colors. You have to kill a lot before you start to see colored ones spawn. For example, if you do the Sleeping Dragon Champ Spawn, when the Hiryus come out, I'm sure you'll see at least one, possibly two colored ones. The Cu's only spawn in a couple of places in Twisted Weald, so it will take awhile to get a rare colored one.

Nice

And just think how long it would take to get a rare colored one with a good level on it...geesh 

That makes them a valuable commodity now doesn't it?