Ruthless Invasion

Falter effects are mono-color by necessity: the spell that strips away blockers for an alpha strike has always lived in red, paid for with red mana, and used by decks committed to red aggression. This one severs that link. Because the colored pip can be paid with two life instead, a deck splashing the thinnest sliver of red, or one running no red sources at all, can still cast it for and a life payment it was probably going to spend winning the race anyway. That untethers a mass-evasion sorcery from its color identity and lets it slot into any aggressive shell that wants the effect. The carve-out for artifact creatures is the strategic wrinkle: it clears the flesh-and-blood wall but leaves metal blockers standing, so it rewards reading the opposing board before committing the swing rather than firing on autopilot. The novelty here is not the effect, which sits in a long line of one-turn-only blocking removal; it is that the cost no longer dictates which deck gets to run it.