Goblin Bombardment

The free sacrifice outlet that became the reference design for the entire category. Most outlets attach a cost: a tap, a mana payment, a once-per-turn cap. This one charges nothing beyond the body itself, and that absence of friction is the whole point. Because the activation cost is purely the creature you feed it, the card scales with whatever generates those creatures: an arbitrarily large supply of tokens or recursive bodies converts into an arbitrarily large pile of damage, one ping at a time. The ability carries no timing restriction, so it operates at instant speed, and that does heavy lifting. Sacrificing a creature an opponent is trying to kill turns it from a blank into value, and the damage can be split across multiple targets in a single turn, so the same enchantment serves as both a kill condition and an interactive tool that picks off blockers or finishes a stranded opponent. The one damage per activation is the payoff and the only governor on the design, a soft one: anything that loops a body back, or makes two where there was one, multiplies the total output without ever raising the cost. Whenever Wizards has wanted a free outlet whose reward is small enough to lean on a combo for the rest, this is the template it has circled back to, and few imitators have executed the brief as cleanly.