King's Bounty: Armored Princess

That's it, all that's left is to complete the arena and defeat the two bosses, Khtau and Baal. :)

And I just defeated KTAHU. He was my 3rd boss (after the spider and the toad). I'm playing slowly on a difficult level, and it's currently the 7th day in the game!
I defeated him with a group of 46th-level units (a dragonling - 55th level) - for the battle, I took 2 stacks: 291 simple vampires and 12 emerald dragons. In the first round, Khtau killed one emerald dragon with a mass attack... but there were no more losses! The battle lasted 60 rounds. At the end of the battle, 1 emerald dragon recovered after the battle (with a level 3 resurrection skill).
All that's left is to clear the islands - Unnamed, Elonu, Sheterra, plus defeat the Driller and Demion, and then Baal :)