Hagra Sharpshooter

Five mana to shrink one creature by a single point in each dimension, until end of turn, with no cap on how many times you can pull the trigger: that last part is the whole engine. Because the effect resets at cleanup, no single activation accumulates, but the ability has no once-per-turn restriction, so the real removal is spent in bulk. Ten mana knocks a target down -2/-2; fifteen takes off -3/-3, enough to kill a modest threat outright in one turn if you have the mana to burn. That is the pricing bargain: the card is cheap to add and ruinously expensive to use as a finisher, a valve that trades your entire turn's resources for one dead body. Left to drip a single activation per turn, it clears small attackers or softens a blocker before combat so a larger creature trades up. The Ally tag places it in a tribal framework where sharing a creature type mattered more than the stat line, so the 2/2 was built as one cog among many rather than a threat on its own. What it cannot do is win a game by itself or answer anything at instant-cost efficiency; it is repeatable removal for grinding, mana-flush endgames, where the choice each turn is how much of your mana you are willing to convert into someone else's toughness.