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The number of dragons depends on the game duration and difficulty level. When I first exited the dungeon to fight Nicholas and his satraps, I had 70+ emerald dragons. The enemies fled from Faidan as fast as they could. If they managed to catch someone in an open field, they would immediately run away from the battlefield, even if they had more than 100 dragons. Catching them is not easy, as I didn't invest in logistics.
I played through the game in version 3.0 using a hero.