Azure Fleet Admiral
Most monarch enablers hand you the crown and then leave you to defend it, which is the standing problem with the subgame: the moment you become monarch, every opponent has reason to swing at you, and combat damage steals the crown right back. This 3/3 does not defend the throne it grants; it does the opposite, and that is the point. Its evasion is tuned to whoever currently holds the crown, so when you become monarch it reads as blank, and when an opponent takes the crown back through combat it becomes an unblockable path to reclaim it. That is the honest tension in the design: the body is only fully "on" in the window right after the crown has changed hands away from you, and it self-corrects that window by threatening to change it back. The static ability checks its condition against whoever holds the crown at the moment of the block, so the evasion updates in real time as the throne passes around the table. That makes it less a value engine than a governor on the monarch subgame, discouraging any one player from walling the crown behind a wide board, because this creature simply ignores that board on its way through. Two abilities do the work: the enter trigger grants the crown, the static clause keeps it circulating. Quiet multiplayer engineering, with each ability aimed at a different half of the same problem.

