Court of Garenbrig
The monarch mechanic ties card advantage to combat pressure: you draw at end of turn only if you still hold the crown, so keeping the throne means keeping enough of a board that no opponent's attacker gets through to take it from you. This enchantment builds its whole engine around that assumption rather than treating the crown as incidental. The upkeep trigger distributes two +1/+1 counters among up to two creatures, then, if you're still the monarch, doubles the +1/+1 counters on each creature you control. That doubling is not a linear buff; it compounds. Two upkeeps of holding the crown turns a modest pile of counters into a runaway threat. The tension the design resolves is that monarch decks need bodies on the board to keep the crown from changing hands, and this gives them creatures that grow the longer they defend it, sharpening the incentive that protects the throne in the first place. It also opens a wider payoff line than the rate suggests, because the doubling reads "each creature you control": a go-wide counters shell and a single overgrown threat both cash in. The catch is the one every Court runs on. The doubling clause checks the crown; lose the monarchy and the enchantment keeps distributing its two counters but stops doubling, degrading into a slow, honest anthem the moment an opponent connects. The card is at its most explosive precisely when your board is already ahead, which is the monarch's whole bargain restated in counters.

