Ohran Yeti
The first strike never welds to this creature the way a printed keyword would, and that is the point: the activation is a recurring toll, paid two generic plus one mana drawn specifically from a snow source, charged every turn you want the edge and only on turns you can spare combat mana over spell mana. The cleverer wrinkle is that the ability targets any snow creature, the Yeti included, which recasts a plain 3/3 as a combat-math utility piece rather than a lone attacker. Point it at a bigger snow body and it steals fights that body had no business winning; aim it at itself and the 3/3 trades up through a larger blocker; or hold the mana open as an ambush against anything that crashes in. Lean on a snow base and it grinds out steady combat advantage; run snow lighter and the ability hangs just out of reach, leaving a body whose toll you cannot afford to pay. What is telling is the direction the design aims its tribal resource: at the combat step, not the more durable jobs snow later grew into (mana fixing, payoffs that count snow permanents on the board). It belongs to an early, self-contained experiment with the mechanic, one that rarely traveled past its own card pool, a record of a moment when snow was asked to power a creature's offense rather than underwrite its color.
