Zehir suffered his first losses during the assault on the dark elf castle. Before that, he defeated everyone without any losses. He tried to storm Claw a couple more times. Once, he used only his own army, and the second time, he took the 7th-level units lined up in front of the castle. The result was the same – I was defeated in 5-10 minutes.
I will take Claw somehow. I haven't explored a large part of the map yet. Maybe I'll find something suitable. Or maybe I'll do what they suggested here – level up Zehir's skills. In any case, Zehir's army will grow. In his hometown, I have the Tear of Ashi, which I brought from the 3rd mission.