Train some Archers or Barbs, Or any troop.
Select your Spell factory, And just let the menu with, "Info" "Upgrade" "Create" buttons there.
And just watch the spell factory empty when the troop comes out of the barrack, Then the spell factory refills.
So when a troop is finished training, The spell factory empties and refills each time a new troop is trained, But you only this when you have the spell factory selected.
I'm not sure if this has been pointed out or anything, Or don't know if this is known, Or an bug,
But,
Thanks.
