I don't list most of the deciduous abilities in this article, but as this used to be evergreen, I left it in
Flexibility makes a card easier to sell later
While this could potentially be explained as an error, Eurogamer cites GAME staff (speaking under anonymity) who say they were told by management that the decision was deliberate
For example, if Narod, the Beige Flower and Doran, the Siege Tower ("Each creature assigns combat damage equal to its toughness rather than its power") are both on the battlefield, each time a creature would deal combat damage, that creature's controller chooses whether it assigns combat damage equal to its mana value or its toughness
Honorable mentions Top Blue Enchantments that Draw Blue may not have as many enchantments matter cards as some other colors, but that doesnt stop it from having some of the best card-drawing enchantments in the business