Queen Ravenovia

When Ravenovia enters, you become the monarch, permanents you control have hexproof if you are the monarch.
They said she was a just queen, gave birth to strong sons that would lead wars, conquer lands, and both would become Kings in their lifetime. All beloved Sergei, he was said to be a kind king, superior to her oldest son Strahd, who was said to be a just but harsh ruler.