Imaris
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Let's say I summoned 7 Hydras and waited for 2 months. Then I got 40 Furies + 8 Minotaurs... for 7 Hydras... You could argue about this; I wouldn't bother and wouldn't keep trying.
Is there a mod that balances the Dungeon faction?
I'll check when I get back from camp; maybe I'll make one if I feel like it.