The mission was so-so; Tainar was incredibly annoying with his teleportations and magic. Sandor was my warrior, and I leveled him up a lot. I played it like this: I cleared the area around the first castle, captured the second castle on the island, and cleared the rest of the first island. By this time, Tainar was getting on my nerves, so I sailed off to find the demon cities. I captured the remaining two demon cities (one on the island in the middle of the map, the other in the northwest) and then calmly cleared the rest of the map, visited the upgrade locations, and arenas. I closed the portals with secondary heroes. I calmly accumulated 500 crystals and defeated the Worm. Have a good game, everyone!