Summons: Your thoughts.....

[Lazy_Perfectionist]

However, Umbrals can't be central to your strategy as Middle Era Agartha, IMO. Only national mage capable of summoning them is the capital-only Oracle. If they've got the spare time, its a very good use of their summon, but unless you get (onyx?) amazons or the right independent mages, it just costs way too much to get going as a central part of your strategy. Quite a bit more viable in LA or EA.