I attacked this guard three times, and each time the game froze. Not just froze, but it caused the computer to hang. I had to force-quit the Heroes process and reboot the computer. Eventually, I changed my strategy and attacked the guard a week later with a full army (returned to the mentor in the treasure). The archliches were wiped out in one turn, and I easily captured the artifact. So, I consider this a bug in Heroes (either a map bug or a template bug – I'm not sure exactly). But I had to change my strategy after three freezes. Otherwise, we wouldn't have finished the game. From the opponent's perspective, it looked like I had disconnected, but in reality, the game was completely frozen.