*Aeternus are from the gigaconstructs mod, I can't imagine playing the game without this mod now it fixes late game.

Coming back to this, this battle pushed the limits of the game and my limits as a strategist. It was against the Aeternus, the ultimate end game enemy, I've never been able to have another battle of this size again. I love the roleplay aspect of this game, you're made to put so much time into a play through already and this was my penultimate moment.