sork96
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Thank you for your answers; as a result, I understand that the developers of Heroes 5 simply really wanted to rip us off by adding (or rather, not adding) the earthquake spell, which, as it turns out, doesn't work at all :D
"Я слишком часто имел дело с идиoтами, чтобы к троллям были какие-то претензии" © Дийкстра (The Witcher 3)