Oona's Gatewarden

A wall that maims on its way out. Wither rewrites the contract of the defensive blocker: where an ordinary wall absorbs damage and resets the board to neutral by end of turn, the -1/-1 counters this leaves are permanent, so even a single block costs the attacker two toughness it never recovers. The catch is that it almost never survives the exchange. At 1 toughness, it dies to nearly anything it stops, so the value is the trade, not a recurring tax: it dies, but the attacker walks away from combat two counters smaller and stays that way. The hybrid casting cost is the structural reason a piece this cheap turns up in builds that touch only one of its two colors, since neither has to commit fixing to play it. Flying does more than it looks: a one-mana flying body that permanently shrinks whatever it intercepts covers the evasion axis that ground-bound walls leave wide open, and a flier with Defender exists purely to sit there. The whole design inverts the usual stall card. A normal wall buys time and changes nothing; this one buys a turn and shaves two off the attacker on its way to the graveyard, so the board stays permanently altered even after the blocker is gone.