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A tough game, one of my best in recent times, I think.
At the beginning, it took me 3 weeks to finally break through to the opponent's portal and take the castle.
I was one day away from the portal to the Dungeon when Erin appeared.
I drove her away, losing some units and a large part of my wyverns.
Further, at the entrance to the castle, there was another hit-and-run attack, resulting in the loss of 3 stacks – leaders, fighters, and beetles.
I attacked the castle, and there was a Leto with a bunch of meat (Sergei didn't have enough money for the rest), and I killed him too.
I arrived just in time; it would have been more difficult later, although I had an Irka, and I think I could have defended against the hit-and-run attacks.
Thanks for the game.
P.S. Perhaps the best option for the Orc against the Dungeon in duels is 2 and 4.