Hey, thanks for playing. Sorry, some of the standard RTS things are (not) yet explained in game.
When I select a summoning circle I get an option to make it move which doesn't make sense.
The command you give to the Circle is the command given to all units it spawns. Rightclicking with Circle selected will set its "Rally Point"
Could there be a way to select units by type? I don't play RTSs really.
It’s via CTRL+Leftclick a unit, though it will only select nearby units of the same type. You can also CTRL+Leftclick on a portrait in the UI and it will keep all units of that type that are in your selection. You can also CTRL-Click a Summoning Circle to select all from that Coven. This is useful for setting a Rally Point for all of them, for example.
What is coven territory?
It can be anything, is up to the map maker (me) to visualize it intuitively. (Guess I failed.) Summoning Circles are always on Coven territory.
It seems like my King doesn't auto-attack?
When just Right-Clicking on territory, all units prioritize moving there, and will only attack once they have reached their destination. Using "Attack Move" is the solution: First press A, then Leftclick on territory. Now the selected units will move to that destination, but attack all enemies on sight on their way.
The Witch King here is same as all other units, except he cannot do anything else if he is currently making an Envoy.
What does depleting do?
It sacrifices a Summoning Circle in return for temporarily spawning one extra unit for every unit spawned in that Coven.
The minimap is confusing!
The map repeats infinitely - I had a version that showed the repeat instead of dark corners, maybe that would be better?
It seems like all my dudes are useless except my Witch King.
There is a lot to discover here.