Let's come up with an amphibian race!

Considering that all major battles take place on land, and the Gar'ians have penalties on land, there's no point in wasting resources on ships. They're not that significant.

Added 1 minute ago

Well... the penalty is a given. But the plan is to increase the movement range on land to a normal level. Damn... I'm getting confused. I remember seeing a problem with this somewhere, but I can't recall what it was... :(

Only to a normal level, when land units can increase it.

Added 1 hour 22 minutes ago
Evaluate our balance regarding movement on the map. We propose the following: when emerging from underwater, there are stables where the hero needs to buy a horse; otherwise, the hero's movement is reduced by a factor of n. That is, the hero can move on land, but it's costly. The same applies to land heroes – they can move on water, but slowly. A horse, like a ship, can be summoned with a spell if you left it somewhere. If it's outside the zone, you can buy a horse at a stable, which increases movement on land. The same applies to land units – there are movement enhancers on the sea, where you can buy a ship. The presence of an artifact for movement on land or water remains necessary. If there is no artifact, the ability to move on land/water is absent. I think that's all! :)