Flamestick Courier

The trade-off is the whole mechanism: leave this Goblin tapped and one of your Goblins keeps the buff; untap it and the pump evaporates. That conditional, anchored by the optional untap clause, turns the body into a standing investment instead of a momentary swing. You are not spending a card to win a single combat; you are pinning a 2/1 to the table to maintain a +2/+2 and haste on whichever Goblin matters most, redirectable to a new target each time you untap and re-tap. The haste rider is the real payoff in a deck that empties its hand quickly, letting a freshly cast Goblin attack the turn it lands while wearing the bonus. The cost of holding the engine open is concrete, though: a tapped Courier blocks nothing and attacks for nothing, so the anthem comes at the price of a body on defense. It looks like a slow combat enabler, but structurally it is closer to a continuous buff you rent one creature at a time, an unusual shape for a three-mana common from an early-era Goblin set.