I wasn’t playing actively during the times of many of the UC monsters, so I missed them 
Yes.
ok thank you. I used to just not do the online events and just play offline story mode, but now that I am doing the online challenges I wish i had some of these monsters to make life easier
Nighthunder will probably take more than half a year.
Survival of fittest gives the previous UC SE rewards.
Yeah, it takes a while but they do come back.
On the bright side, gearcroc and serazael should be arriving very soon. 
Why don’t Blitzdragon?
Blitzdragon already returned.
Really? When?! Omg I missed it ️