Right now what he's planning is to sit down and write a very long letter.
He's...writing it from a very different place than his report to Bastran. He is not actually intending to show a copy to Bastran. It's - not really the right question, which angle is more sincere or more what he really believes, it's just that communication is a two-place function and if he wants Iomedae to come away understanding his intentions, he needs to write it with the person she is in mind.
(There's another half-formed thought behind that one, and a tangle of emotion, but not one he can take the time to follow right now. There are a lot of urgent priorities that come ahead of figuring out his own feelings.)
To Iomedae of the Knights of Ozem
I, Archmage-General Altarrin of the Eastern Empire, am personally writing this letter to you, though I speak on behalf of my Empire.
I wish to begin this letter with several apologies. Given the differences between our worlds, I am not sure how to express it such that you will understand, and I hope you will take into account that my words may be misunderstood because I lack some critical understanding.
I am sorry that I killed you. The decision is one that made sense given what I knew at the time, but I regret having failed to notice my uncertainty and lack of context, and particularly that I failed to notice a situation where the gods of Velgarth might be manipulating us in an unexpected direction. I would likely have made different decisions had I received your letters in the order they were sent, and particularly if I had known your explanation that Aroden was once human. Given how often the gods' goals seem to be the precise opposite of my own, the fact that They appear to have worked very hard to deny me that information, in itself, evidence to me that negotiating a ceasefire with the Knights of Ozem, which is something I would have been more likely to do had I known more, would have been a path I end up preferring.
I regret deeply that the Empire, seen from the outside, is a place you would so predictably oppose. I regret the lives lost in the war with Oris, and while of course at the time the Empire was very opposed to your work, I do regret that our actions took you away from the people you had committed to help, with the result that they were overextended and lost a war you had asserted to them could be won. I imagine this would have bothered you a great deal. Having now seen the war that your order is fighting in your own world, I also regret having kept you from it for so long, and the cost your people very clearly paid for it.
And I regret the initial assumptions I made about you and your god. I hope that you may understand better why, if and when you learn more of the gods of our world; I expect you have already made some updates based on the fact that it appears They were steering for your death, and at the highest cost to the Empire that I was willing to pay. While I cannot say, at this point, that I know enough to be certain that Aroden is a god I would approve of, I ought at least update my baseline priors – and when I am starting from uncertainty, rather than the near-certainty that any given god is hostile, the specific evidence you have provided is at least somewhat compelling and I am very motivated to verify your claims and learn more. An allied god would change almost everything for our Empire, and if such an alliance were on the table, it would more than justify making compromises on some of the Empire's currently policies in order to secure it. I imagine is an outcome your order would be pleased about as well.
I understand that, given the Empire's actions in Oris, we are not starting off on grounds where you or the Knights of Ozem have any reason to trust our motives, and it is on us to prove them. As an initial offer of good faith, I am returning some of your artifacts, so that you may be better equipped in your current war. While I would be grateful if you considered it part of an agreement not to conduct further offensive operations against the Empire, including in Oris, I explicitly do not expect or demand anything in return for this offer, since it would be unreasonable to unilaterally force an agreement that you had no opportunity to negotiate or decline.
If you wish to speak further, I have a means of scrying your world, and of transporting myself or others there, or retrieving objects or people to Velgarth. I am not yet confident enough in the Knights of Ozem to invite a messenger here or to send one of my own people to you, but if you have a means of translation that lets you write in our tongue, you can write your reply on the back of this letter that I have left blank and leave it in a deserted scryable area, I will take this to mean that you accept the terms of my offer and would like to conduct further talks.
- Archmage-General Altarrin, Duke of Kavar, representative of Emperor Bastran IV and the Eastern Empire.