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Taking the Crypt with 6 Centaurs and 14 Enhanced Elves, without magic. The original author is unknown to me.
We divide the Centaurs, placing one at a time. We position the Warrior next to the hero, followed by Centaurs, then Elves, then Centaurs (C-Centaur). The Elves are placed in the middle. In the first turn, the Elves shoot at the Vampires, dealing -5 damage. C1 runs towards the Elves, and C3 and C5 stand close to the Ghosts. C6 stands at the very bottom, 4 squares away from the Zombies. The rest of the Centaurs wait. The Crypt army advances, the Zombies move along the edge, and the Ghost kills a Centaur. The remaining Centaurs run to the upper left corner. In the second turn, the Elves finish off the Vampires. C6 positions itself in front of the Ghost, and the other Centaurs run away from everyone. The Ghost kills the second Centaur, and the Skeletons and Zombies are already close to the Elves. In the third turn, the Elves run to the corner where the Vampires used to be. The Centaurs scatter so that no one can reach them. One of the Centaurs remains near the Ghost. The Ghost kills the third Centaur, and the Skeletons and Zombies move towards the Elves. In the fourth turn, the Elves kill the Skeletons. The Centaurs run after the Zombies, but not close enough for them to catch up. The Ghost eventually flies towards the Elves, and the Zombie joins the chase after the Centaurs. Then, the Elves deal with the Ghost, and the Centaurs lead the Zombie. In the end, only 3 Centaurs die in the Crypt. I hope I explained everything more or less clearly. (although there is a chance that the Vampire won't die from two shots, but it's very small).
Added 7 minutes later
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Incorrect description, as you did not specify what skills and abilities the hero had. The starting hero of level 1 (I checked on Ivore) cannot kill 14 Enhanced Elves and 5 Vampires (even with the most favorable distribution - 6 Vampires still remain after the first shots), and as a result, after two turns of Elves attacking the Vampires, 2 Vampires remain alive. Also, 10 Witches cannot be killed in one turn - only 7, and 3 Witches remain (although the Crypt can still be taken with such an army, but with greater losses of Centaurs, and it also matters whether it was on grass or not)