Coalition Victory isn't the first (excluding the ante card from Ice Age, that goes to Prophecy's Celestial Convergence as far as I can tell) nor most famous instant win within Magic: The Gathering (Battle of Wits has its notoriety), or even best understood by someone with no understanding of Magic (The Cheese Stands Alone).
How about replacing it with Exodia? Its early role in the anime makes it more likely the general public is familiar with it. https://yugipedia.com/wiki/File:ExodiatheForbiddenOne-LART-EN-UR-LE.png
