I read the discussions... Again, a few words in defense of the Swamp ;) They often learn water magic... And 3 levels of magic - but that's more than enough! Believe me... Expert teleportation, level 3, for 3 mana - that's a dream!!!!!!!!!!! A bunch of Hydras against a group of enemies - it's terrible! The snakes will fly over and take away all the useful things from the enemies... Gorgons are BEASTS! Use them exclusively against creatures of higher levels. Wyverns are good when you have them at the beginning of the game... The only downsides of the Swamp are the few archers and the high wood costs. That's it.

Water magic... oh, what beauty, you can move mountains with it in the game... you can teleport a hero to any of your cities from anywhere on the map... make 4-step teleportations across the map, create powerful explosions, and raise fallen warriors... :)
The only useful spells in this book are Mass Heal and Remove Curse, Prayer, and the infamous Teleport. Only the first two spells are not very effective for the Swamp; they are like trying to catch water with a fork... as they were, they will remain in most cases, and the opponent will have the last turn, and regarding Teleport, please, throw them without the support of other forces, such as Hydras, into the castle... they will be buried there.

Added 3 minutes ago

I repeat - see my post above... Expert teleportation will solve all your problems! ;) Good luck mastering the Swamp!

I HAVE NEVER PLAYED and I WILL NEVER PLAY THEM!!! especially against decent opponents on large maps