Ghostly Keybearer

Rooms are split enchantments that arrive with one half locked: you cast one door, and the other sits dormant until you pay to unlock it. That unlock cost is the tax on the mechanic, the thing that keeps a two-in-one enchantment from outclassing two separate cards. This body sidesteps that tax entirely. Connect in combat and one locked door opens for free, which turns an evasive 3/3 into a discount engine for a Room-heavy shell: every hit is a spell's worth of value you never paid for. Flying does the load-bearing work here, not the stats. The trigger keys off combat damage to a player, so getting there reliably matters more than the raw body suggests, and 3/3 in the air clears most early blockers while dodging the ground stall a Room deck tends to build for itself. The design reads as a reward calibrated precisely to a mechanic that lives and dies by its unlock economy: it does nothing without Rooms to open, and quietly bends the math in a deck full of them. That narrowness is the whole shape of the card. It is not a generically good flyer with a bonus bolted on; it is a payoff creature that asks you to have already committed to the archetype it feeds, and pays out only for players who did.