Ashmouth Hound

A 2/1 whose entire combat presence is the threat that it bites first. The damage trigger fires during the declare blockers step, before the combat damage step ever arrives, which is the whole engine: any X/1 the Hound blocks or gets blocked by is dead before it can swing back, so the Hound takes no return damage and walks away clean. Against bigger creatures the point softens the blocker so a teammate can finish the job. Attacking into open mana, opponents have to math out whether their blocker survives the extra ping; defending, the Hound discourages chump-trades and outright kills the one-toughness creatures that fill out aggressive curves. That timing asymmetry is the design idea. Plenty of creatures fight on the battlefield through pump spells or activated pings, but those operate during the combat damage step or off a separate activation; this one folds a piece of that interaction into the act of blocking and being blocked itself, taxing every combat decision around it without spending a card or a mana. It rewards aggressive sequencing more than the stat line suggests, because the question is rarely "does it win this fight" but "how much does the opponent have to overcommit to make the fight happen at all." The single point of toughness is what stops it short of being a wall: it dominates the X/1s but folds to anything that can soak the point and hit back, so it reads as a recurring threat of a favorable trade rather than a fixture.