The Subclasses (Order Domain/Circle of Spores) found in Guildmasters’ Guide to Ravnica (GGR) are now accepted as full subclasses. As such they are no longer considered UA, and can now be multiclassed with. That means that anyone who is using the subclasses currently must update their character to the proper version.

These two subclasses are the only pieces from GGR that are acceptable to be used by players.