1
Okay, problem with this claims logic:
[...]
3. Even if you did have claim under Shadovar, no heir of Shadovar-contra-D'Hara exists. Find me a descendant of Shadovar's rulers who can press the claim, a direct descendant with some kind of real claim. Simply because you were bros with a realm doesn't mean you are the lagl inheritor of their rights and liabilities.
Descendants exist.