Territorial Hammerskull

The attack trigger fires before blocks are declared, which is the whole point: tap the biggest wall an opponent controls, then swing past it. That timing turns a modest 2/3 into a lane-opener, either for itself or for whatever is attacking alongside it, because the tapped creature is barred from blocking that combat entirely. It functions as a single-target soft Falter, folding a bit of evasion into the attack step without ever printing evasion on the body. The restraint is that it taps rather than kills, and only one creature at that: the defender untaps on its controller's next untap step and is free to block or attack normally next turn, so against a developed board this buys one turn of pressure, not a permanent path through. That transience is what keeps it at common rarity. Where the effect earns its keep is on the front of an aggressive white curve, where the plan is to keep declaring attackers turn after turn and never give a defender a clean, untapped block. The card sits in a small lineage of white bodies that clear the way for their own swing rather than fighting through blockers with size; here the clearing is temporary, repeatable, and tied to the one thing you were going to do anyway.