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I don't understand you... first you say there are no expensive units, and now you claim that the tower is expensive... that's strange.
Yes, exactly. The tower is a very expensive city, but it's worth it. I especially like the Frost Mages (from 3.5), and in general, I really like this faction in the third game.
As for the Castle, I'll say that in the third game, the Archangel is formally the strongest unit. The Spearmen are very weak, but the Archers are very helpful at the beginning. And various blessings greatly strengthen the Castle's army.
УШЁЛ НАВСЕГДА ОТ ВАС КРИТИНОВ....ГЕРОИ ГОВНО ВЛАСТЕЛИН КОЛЕЦ ФОРЕВА