[quote=@Raylah]
Then I am interested.
Just some questions. Why would the king's bastards be considered equal to his rightful children? How is it with magic in the world? Is there some closer specification on the "game"?
[/quote]

So I'm honestly doing the whole bastards thing in the sense that he declares anybody of royal blood, and not just his own kids. Because he feels it would give way to a true king from wherever they ended up in life. Mostly because it opens more character opportunities than "Here are the few rightful rulers, they all lived in a castle, maybe one hates the other." Which would be tried and kinda dull by now. 

As for what the game is, I'm honestly trying to figure one out that's balanced-ish. Like at the moment I'm thinking a mcguffin has been hidden somewhere in the kingdom and the first to find it is the true heir, but then somebody would probably try some kind of "I found it in the backyard, I am the winner now!" kinda thing. Again, as stated above it's an idea in it's very rough stages, and I'm open to what people would like/not like out of this scenario. 

As for magic, I'd keep it fairly balanced. No masters of the cosmos who can bend space and stuff like that. Honestly I think around level 5 in DnD would be a fairly open but not abusable place to start.