Пандора
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They slow down the army when moving, which is not helpful, but rather the opposite! But the Mantis moves amazingly well on the battlefield, and even outside of it!
Yes, I agree. But they are irreplaceable for defending the castle. When there are many Water Elementals, it's tough. First, they inflict Slow, then you can use Weakness or Fatigue. For the lazy, there's also Ice Arrow, meaning a regular attack from this warrior deals cold damage (ice attack). Plus, it's an elemental (ideal against vampires), and of course, a mage (I've already explained this), and it has resistance to cold (ideal against Haven).
Hives are also good for defense. With Ice Arrow, they inflict Weakness.