I, by the way, found the prospect of producing gray units very questionable (even though that was the intention) because then brown would start appearing with a growth rate of 3 castles (and in one of them, there would also be a Grail), so I had to delay a bit and destroy it. In the battle with him, the Spirit of Despair as a starting bonus would have been very helpful, but I didn't feel like replaying. (And the Spirit of Despair also adds the possibility of using 4 vampires to take the cart from the dwarves, but that's only for the most patient players :D)
You fight 40 dwarves, and you get only 1 skeleton in your army, which is disappointing).