Either way, Owl-style Birds achieved mythic rare bomb status in Avatar: The Last Airbender thanks to this Hydroid Krasis-esque -costed Bird Spirit with flash, flying, and vigilance that nets you cards upon it entering as well as whenever your foes search their library
With the right support, Jolene can become a massive powerhouse thanks to doubling your Treasure production
With the advent of singleton formats like Commander, however, that all changed: when you can only include one copy of a given card anyway, the legend rule no longer matters
Choose a creature at random
Mystic Snake was often a way to do damage to an opponent who you otherwise couldn't find an opening to get a threat down against or a two-for-one by fighting one of the many bears that were in decks in those days, and when it did these things it was good
With so many different cards to open, you could fill an entire eight-person draft and not see the same card twice