Oxidda Daredevil

The activation cost is the whole pitch: an artifact you no longer need becomes the fuel that turns this goblin into a surprise attacker. Where most haste enablers ask for mana or a permanent investment, this one converts board state you were already willing to lose, which is why it sat naturally in an artifact-heavy aggro shell. The trick is that the body and the enabler want the same thing. A 2/1 for two is already something you'd attack with the turn after it lands; the sacrifice clause exists to skip that wait, cashing a spent equipment, a tapped-out mana rock, or an artifact creature that already swung into immediate damage. It also rewards builds where artifacts die for value elsewhere, since the haste rides along on a sacrifice you'd make anyway. The ceiling is modest by design: the ability grants haste to this creature alone, lasting only the current turn, so it's a tempo lever rather than an engine, and the single point of toughness means it's easy to trade with the moment it gets blocked or takes damage. It belongs to a moment in the Goblin Artificer lineage, where red's tribe stopped being pure beatdown and started caring what happened to the artifacts around it.