Along with MajikkanBeingsUnite (https://www.deviantart.com/majikkanbeingsunite), I would like to work on getting the terms "closed universe" and "open universe" to be more widely known.  An open universe is one where interactions between characters from that species/group/setting can interact with other characters.  A closed universe is one where they can't.  This is separate from the status of a species, you can have open species with closed universes and closed species with open universes.  And anything else. Some Closed universes I have: pikumon (https://www.deviantart.com/pikumon) CTnet (https://www.deviantart.com/ctnet) (as an MMORPG AU to CardTamers (https://www.deviantart.com/cardtamers), it makes a lot of sense) CardTamers (https://www.deviantart.com/cardtamers) KimechARPG (https://www.deviantart.com/kimecharpg) Some Open Universes: HoodPups (https://www.deviantart.com/hoodpups) @WhirbetsWor