kolotok
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The author intended to use quicksand again, but since the crystals are faster than the Wizards, the tactic from the previous battle didn't work. A modernization of the battle was needed. Instead of figuring out how to implement it, I simply used Wizards + Phoenixes. In the first round, I blocked the Liches and put the Wizards under Fire Field. In the second round, I summoned a clone. The damage from the Wizards was enough to defeat the Liches in a few rounds until all the Phoenixes died. Then came the quicksand, resurrection of the Phoenixes, and finishing off the crystals. As for artifacts, I had to equip the Lightning Amulet and the Medal (I was using Forgetfulness). It's a rather banal tactic, but it worked.
In principle, the second hero with Liches can also be defeated using the same strategy as the first. The only difference is that the crystal creatures will move first, and you need to position yourself so that when they move, they won't have enough movement points to complete their turn. We move to a new point on our turn, and so on. The only difference is that they move first, but the strategy is the same. At least, that's how it worked for me.
