Haven – "Everything is mixed up, truth and falsehood" [Campaign 3 – Mission 2]

Guys, where can I find the "Goresnaya Pesn" dynasty weapon? I'm playing as Anton on the second level. I just need to defeat the ghost in the castle. But I don't want to finish the level without the weapon. They say it's on the second level near the Castle of Carilia. I looked everywhere, but there's no such castle... And I think I've searched the entire map.