Posts from [Heroes V] Shalassa Castle Auto-translated

Aquahaven – the name is a bit silly, but I couldn't think of anything better. Racial ability – Water Spout: A water spout appears on the battlefield, sucking in anyone who gets too close. It also scatters debris and water around the battlefield, creating puddles and barricades. While the former can be overcome by Atlanteans, the latter cannot be overcome by either side. Special Ability – Wrath of Shalassa – allows you to flood a large area on the battlefield and on the global map for a certain period. Atlanteans can pass through it without issue, while others get stuck. You can also create a storm at sea. Skills: Tidal Wave – allows you to unleash a wave on a section of the map near the sea, dealing minor damage to the enemy army and slowing it down. Whirlpool – creates a trap on the battlefield and on the global map, sucking in armies (on the global map) / units (on the battlefield), regardless of their type. Third skill – ???

Aquahav – the name is, of course, nonsense, but nothing else comes to mind.
Racial ability – Water Spout:
A water spout appears on the battlefield, sucking in everyone who gets too close. It also scatters debris and water around the battlefield, creating puddles and barricades – while the former can be overcome by the Atlanteans, the latter cannot be overcome by either side.

Special Ability – Wrath of Shalassa – allows you to flood a large area on the battlefield and on the global map for a certain period. Atlanteans pass through calmly, while the rest get stuck. You can also create a storm at sea.

Skills:
Tidal Wave – you can unleash a wave on an area of the map near the sea, dealing minor damage to the enemy army and slowing it down.
Whirlpool – creates a trap on the battlefield and on the global map that sucks in armies (on the global map) / units (on the battlefield), and it affects any units.
Third skill – ???

This is, of course, all very good, but it is more suitable for Multiplayer and only on water maps. For Singleplayer, this would be an unfair Walkthrough.
Regarding the commander, I suggest something like Sea Baron or Sea Wolf.

Sea Baron is a good idea.