Experimental Lab // Staff Room

The Room structure lets a single permanent pay for itself in two installments, and this one splits its labor cleanly across the doors. Experimental Lab is the ignition: unlock it and you manifest dread, then load the resulting creature with two +1/+1 counters and a trample counter, so what would be a fragile mystery blank instead walks into combat as a hefty trampler carrying stats you already own. The split holds together because those counters persist even if the manifested creature is later turned face up, so flipping to reveal the real card underneath never costs you the growth you paid for. Staff Room then converts combat into compounding value: every time a creature you control connects, you either turn it face up (cashing in whatever it was hiding) or stack on another +1/+1 counter. Both halves trade in the same currency, the face-down body and the counters that dress it, so unlocking the pair turns one Room into a self-seeding aggression engine that builds a threat and then rewards you for swinging with it. Manifest dread is the connective tissue: it fills the board with unknown quantities that Staff Room's flip clause is specifically waiting to cash, which is why the design keeps both doors on one card rather than scattering the pieces. Beneath the escape-room dressing, it is a green counters-matter build-around where you unlock the threat before you unlock the reason to attack with it.