"The Legend". Problems with the walkthrough.

Vulnerability, slow, magic source, stone skin – these are usually found lying around. If there’s no vulnerability, you definitely need to buy it! Teleport, invisibility, dwarf – these need to be found in castles and purchased. Armageddon with a small warrior’s intelligence won’t have much effect, and goblins with catapults are weak against fire – dragons will burn them immediately. This army isn’t the most suitable for the final stage; the cavalry won’t be able to gain momentum, but you can try to create a strike force of ogres. They need to be protected with stone skin, a magic source, negative effects should be removed with dispel, and they shouldn’t be exposed to attacks. At a normal level, it should work.