Archon of Coronation
Monarch normally sets up a cruel bargain: the crown draws you an extra card each turn, but any creature that lands combat damage on you takes it, so wearing it paints a target on your face. This rewrites the second half of that arithmetic. While the crown sits on your head, damage stops costing you life entirely, so the usual punishment for being monarch (getting chipped down to steal it back) still hands the crown to a successful attacker, but it no longer erodes your life total on the way there. The result is a body that dares the table to swing: attackers can take the monarchy from you, but they cannot burn you out or race you, and every turn they spend not connecting is a turn you draw ahead. Even burn spells and direct-damage effects are blanked while you rule, quietly neutralizing a whole class of removal aimed at your face. The 5/5 flyer is the enforcement arm of the deal, hard to block profitably and able to defend the crown by trading in the air. Losing the monarchy is the pressure valve that keeps the effect from being a lock: the moment someone connects, the shield drops with the crown, and the race resets. It is the crown turned from a liability into a fortress, priced at the point where six mana buys a genuine reset of the combat math for the whole table.
