Thats what Jace and others are investigating in the lore for the set, and since Clue tokens are the theme we have, why not build around them
[1] In all instances, the cards had perfect grading scores
That said, both of these rules were broken in later years, with sets like Commander Legends , War of the Spark (through planeswalkers), Dominaria , Dominaria United , Kamigawa block, and The Lord of the Rings: Tales of Middle-earth used Legendary cards as a mechanical theme, with uncommon Legends to boost up the numbers in Limited play
For example, if the top card is a land, you can only play it on a main phase during your turn, and only if you havent already played a land that turn
Mayaels Aria: $2 Mayaels Aria is undoubtedly one of the sweetest win conditions on this list
Saying otherwise would be a lot like saying to not put milk in your cereal or to not spray badger repellent onto your swamp boots