I still can't beat this mission... I've started it from the beginning four times now. The last time, I got further than ever, killing all the Pain Bringers and Pain Lords (or something like that). But then the gates open, and a brown "deadly" creature comes out... I have a large army, but I don't have enough money to buy them all. In the end, the brown creature (and it's just a secondary one!) defeats me with one easy kick.
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