Mardu Shadowspear

The words worth reading twice are "each opponent": the attack trigger doesn't pick a single target, it drains every opponent independently, so the same fragile body that nips one foe for a point quietly taxes a full table for a point apiece. Everything else is built around keeping that trigger firing. The ability resolves on the declaration of an attack, not on combat damage, so a chump-block or a removal spell thrown in the way still costs the defender a life; the point is banked the moment the creature is turned sideways. That is what makes the lack of evasion beside the point. This is not a body that needs to connect, only one that needs to attack, and dash is the mechanism that guarantees a fresh attack whenever you want it. Left on the battlefield it swings again for free next turn; the dash cost is the option you buy when you would rather bounce it to hand at end of turn than leave a 1/1 exposed to a sweeper or a sorcery-speed answer overnight, then replay it clean and hasty. The rate is deliberately tiny, one point off a creature that dies to almost anything, and the design isn't reaching for efficiency: it's reaching for repeatability, an attrition drip that accrues a point at a time so long as its controller keeps declaring it as an attacker.