However, its potential will be tested in Legacy, where efficiency is paramount
I can only think of a handful right now (Djinn Illuminatus, Harness the Storm, Frankie Peanuts, Cloudstone Curio, and Tooth and Nail) and there have been times when Spikes have messed up Tooth and Nail by grabbing some game ending combo or accelerating it off major Urzatron lands or other quick mana ramp, and then use something that prevents it from being countered (like Boseiju, Who Shelters All)
Going down the list, you have [[Swords to Plowshares]], [[Path to Exile]], [[Unwanted Remake]], and now [[Erode]]
The overlap of gameplay, nostalgia, and rarity draws in players, collectors, and non-Magic fans alike, showing how multi-fandom demand can amplify a cards market presence