I haven't been on here in a while and was wondering on how to obtain it. Do you have to zap for it?

You have to chuck one of your pets into the Rift :) If their species is available in riftborn, they'll come out about a day or so later in that color, and if not, you'll get one of the available RA experiments

OoOo that is cool. I wasn't sure what would happen if you threw your pet in so never tried.