The OverSeer (DM_Player)
This topic is suggesting a game feature which is popular for TBS board games known as the Dungeon Master(DM) or as it's being referenced here the OverSeer. This player is an optional setting.
The OverSeer(DM) is a human player who does not actually exist or fight on the map, but someone who has complete power over the game. This player serves to increase fun and game balance for all players. Some of his many abilities and/or responsibilities include:
1) Monitoring gameplay activity
2) Creating events, quests and story depth
3) Adding creatures, animals, and beings on the map
4) Adding places, map details, and character into the map
5) Expands an existing map allowing the real players to continue playing into a larger map with new challenges
6) Moving, helping, balancing, and tweaking the Independents and AI opponents for their problems
7) Providing in-game repairs for bugs, exploits, terrain problems, and issues which might take away fun from the other players
The OverSeer(DM) was very successful for Neverwinter Nights and having such a player for Elemental would increase replay value. Even for singleplayer someone could control the world behind the scenes as multiple AI opponents fight for control. This player is optional and does not need to exist for playing.
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EDIT: The Overseer(DM) does not have to play every turn within a game and may choose to use sleep mode for one or more turns.