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It's simple :)
He would gladly use griffins and angels, but he can't because they have nowhere to land within the castle grounds; I was closely monitoring this. If they were vampires or ghosts, it would have been more difficult :)
Added 1 minute later
Regarding mass spells, his imps have severely depleted his mana reserves; he couldn't even cast evasion on all his units.
Added 1 minute later
Regarding mass spells, his imps have severely depleted his mana reserves; he couldn't even cast evasion on all his units.
