Grotag Siege-Runner

The defender-removal slot is one of the strangest answer-niches in the game: a card built to kill walls and almost nothing else. What lifts this Goblin above the pure hoser is the rider stapled to the wall-cracking. Activating it does not just clear a blocker; it sends two damage at that wall's controller, converting a defensive answer into a tempo-positive attack on a life total. That reframes the entire exchange. A defensive creature is usually a tax on the aggressor's clock; here, removing it advances the clock instead of resetting it, because the two damage lands regardless of how large the wall was. The restriction is the price of that aggression: the ability can only target a creature with defender, so against any deck running no walls it is dead text and the body that remains is a fragile 2/1. That narrowness is precisely what licenses pointing the damage at a player at all. An answer that hit anything would never also get to chip away at a life total on the way out; an answer locked to creatures whose whole job is to sit still and not attack you can afford to be ruthless against the one thing it answers. The cost is modest but real: a red mana on top of the sacrifice. The keyword that pins the target is the same keyword that earns the punishment, and the two damage (a notch under a burn spell's three) is the part that turns defense into offense.