Throne of the High City

The monarchy as a mana investment. Most of the cards that hand out the crown do it for free, as an enters-the-battlefield rider or a creature's combat trigger; this one prices the throne directly and asks you to spend a land to get there. The tap-for-colorless mode is a placeholder, something to do while the land sits in your manabase waiting. The real line is the sacrifice: four mana plus the land itself, with no timing restriction in the activation, so you crown yourself at a moment of your choosing rather than only on your own turn. The monarchy's extra card and combat incentive snap to whoever takes the crown last, and a manabase slot that can become the throne on demand lets you claim it on an opponent's turn, or reclaim it after someone else's attack has resolved and stripped the title from you: you let the combat-damage trigger hand them the crown, then activate to take it right back. The cost structure is the honest part of the design: you convert a permanent mana source into a single one-shot coronation, so the throne never comes cheap and never comes for free. It is a rare piece of the monarch suite that lives in the land slot rather than the spell or creature slot, and that placement is what sets it apart: a mana source today, a kingmaker the turn you decide it matters.