I gave away the win in a favorable game. I captured the opponent's main town on day 126. I had over 200 mana, and my chain spell with 8 spell power and expert air magic dealt significant damage. My army wasn't particularly strong, consisting of 6 fanatics and some other Fortress creatures, but without archers. My opponent had angels. However, on day 127, instead of defending the town and buying reinforcements, I decided to go for the artifact. According to the replay, my opponent's heroes were far away, but fast roads allowed him to reach and recapture the main town. Then he bought reinforcements and headed for the treasure, where he obtained a red orb from two small mermaids.
After that, there was no way to counter Tazar.
Thanks for the game, and good luck!