Xaart
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I confirm: it's an excellent free archiving program. You can download it here: http://7-zip.org.ua/ru/ It also compresses Heroes save files very well (I recently confirmed this): a series of consecutive saves from playing a single map fit into a 7z archive that was several times smaller (even though the map files and saves are already compressed).
Now, regarding the "La reconquista de Viduan" map and specifically your save:
Attacking with Balthazar as he is means he will die immediately.
1) Where is the Berserker? I don't play that way! And we need to attack Madre with fire magic, otherwise we have no chance.
2) We need to get the Spirit of Despair, Golden Bow, and Dragon Wing Cloak from other heroes.
3) We need to get Phoenixes so that we get the first cast of magic.
I ran Prospector, and the situation with the Berserker is very bad. This spell exists in 4 copies:
1 - with the purple hero Arondelor (actually an Efreet). But he is nowhere to be found; I couldn't find him even by going through the heroes in the tavern!
2 - in the city of Losthold in cell 19,2,1. But he is completely inaccessible (this is intentional): he is in the corner of the dungeon.
3 - with Madre herself.
4 - in the city of Colmena in cell 133,5,1. But he is also inaccessible.
And there is no Tome of Fire Magic anywhere.
So, we either need to get Arondelor, or... start over. We could install the Grail in the Conflux and get all the spells allowed on the map, but you have probably already installed it in the Necropolis.
Marmot, thank you for taking a look and sharing. And thank you for the archiver, to you and Lava. I was tired of trial versions of WinZip.
Regarding the points:
1 - Arondelor and all the others were killed using the Chains of War (I already regret it((, I only bought 2 heroes from the tavern from the killed heroes (both are in castles). The others didn't appear, among them were a couple of very powerful heroes.
2 - I can't get to Losthold; I tried through the dimension gates...
3 - I tried to fight Madre with quicksand (I read about it in the thread above), but I still lose.
4 - The Grail was installed in the lower Necropolis initially; I haven't found another one on the map yet. Balthazar visited all the places that give skill boosts, and all the guilds in the cities. I took all the available cities of Colmena, but there is no magic in them. And the Inferno of the Pink one didn't help with fire magic.