I have the PC game but the game does not seem to give you an option to save after the air battle. There is one more ground fight afterwards then it's the game end cutscene. Latest save I have is during the air assault round about halfway through. PM me if you need it.

Note there are two slightly different endings to the game depending on who you sided with. I sided with Zanadalor in my game.

Edit: Meant Bellegar not Zandalor

By fire and by blood I join with thee in the Order of the Flame!

Arokh's Lair - Drakan & Severance: Blade of Darkness forums - https://www.arokhslair.net