Yavimaya Steelcrusher

Two jobs on one aggressive body, and the interesting part is how enlist reframes the sacrifice clause. A red two-drop that eats an artifact has always been a maindeckable hedge: you run the beater regardless, and the destruction rider sits idle until an artifact you care about shows up. Enlist gives that beater a second life before it goes. On a swing, you can tap an unattacking creature to shove borrowed power onto the crusher, land a bigger hit, and still crack the artifact later once the crusher has done its damage. The sacrifice ability costs and a sacrifice but does not require tapping, so this is not a choice between attacking and answering: the creature can swing and then, mana permitting, sacrifice itself for the artifact in the same turn. That flexibility is what keeps the aggression honest. A 2/2 that can pile on borrowed power would be a pure clock, so the ability that removes it from the board is also the reason you would ever want to spend it. It reads as a small piece of common-rarity aggro glue, but the design is doing more than the rate suggests: a creature built to attack every turn also functions as artifact removal on demand, and the wrinkle is that the destruction is not free. You hold up the extra mana to threaten it, so every turn the crusher survives leaves the option of trading a beater for a Signet still on the table.