immortal death + underwater province?

[Norfleet]

I don't think this is possible. No non-amphibious chassis are allowed for non-water races, unless you've been modding the game. The liches are naturally amphibious independent of their water ranks, and they're the only immortals available to underwater nations.

Otherwise, it would go into an endless loop of repeatedly spawning and dying every turn, I suppose. It depends on whether the "spawn from death" occurs first, or the "die from drowning" occurs first. If drowning occurred first, then the unit would respawn after drowning checks were made, and then die next turn, unless you gave it scuba gear. Otherwise, it would spawn, and immediately die, probably endlessly.