Rune-Sealed Wall

Blockers that also do work are the design compromise blue keeps returning to, and this one folds card selection into the stall. A 0/6 stops nearly anything on the ground while asking for no combat commitment, but the body alone is inert: the tap ability is what earns it a slot, letting each turn's stonewalling double as a peek at your next draw and, when that card is dead, a way to bin it. That surveil-per-turn cadence turns a purely defensive body into a slow filter, smoothing draws in a deck that wants to survive to a later plan and feeding a graveyard for whatever wants fuel. The artifact type line does quiet extra work: it makes the wall a target for artifact recursion and a payoff for artifact-count effects, widening the pool of decks that can justify a creature whose whole job is to sit still. The cost is speed. Defender means it never trades in initiative, and one surveil per turn is a trickle, not a faucet, so the card asks a patient pilot to bank small increments of selection across many turns rather than cash in at once. A low-glamour engine piece for the long game, offering a floor against aggression on one axis and a steady hand over your library on the other.