The way these cards are working is identical to how Ikoria: Lair of Behemoths did its tie-in with the Godzilla universe, where cards from the set have alternate art but are still treated as the same game piece
Even with the explosion in grading, raw cards dominate due to sheer volume
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No player may take any actions between the time you create the Soldier token and the time Ancestral Blade becomes attached to it
That said, more niche strategies have emerged over time, such as with Minn, Wily Illusionist Polymorphing a token into Consecrated Sphinx for more consistent generation, or any number of partner pairings Polymorphing Rograkh into some other piece which gets them closer to their individual wincon
All that's left of this ante rule are a few cards from Alpha to Homelands that mention it