Soldevi Steam Beast
A colorless five-drop that punishes its own offense: every time it taps, the opponent gains 2 life, which means the card was built to make attacking feel like a transaction rather than a free swing. That drawback puts it in the small family of Alliances artifact creatures designed around a downside that scales with how you use them, the steam-powered war-machines of a set that liked handing you a strong body and then attaching a string to it. The 4/2 frame is the tell: high power, low toughness, a body that wants to attack while the life-gift on tap pulls the other way. The regeneration ability works against the grain, letting the beast survive the trades a 4/2 normally loses, but it costs you too, since regenerating taps the creature and triggers another two-life gift to the opponent. So every mode of using the card (swinging in, regenerating after a block) routes back through the same tax: incremental life handed across the table by inches. It is a colorless aggressor that arms your opponent's clock as it presses your own, an artifact-era experiment in how much built-in symmetry a beatdown card can carry before it stops being beatdown at all.

