Before Ice Age, players had access to the usual basic lands, and for multicolored decks there were the original ten dual lands and a few rainbow lands like City of Brass
That makes it an excellent choice for toolbox decks filled with silver-bullet creatures like Gaddock Teeg and Dauthi Voidwalker, and it can always represent something like Sheoldred, the Apocalypse or Elegy Acolyte straight from the deck
However, if you use Dimensional Fissureand Macro Cosmos, you can remove it with D.D
Due to the presence of this card and Kaori, there are more than a few Duelists who use Tsuitsui and Kozusai, which can be chained even from the second attack and hit from above, as the main or side cards, rather than Nagisa and Light
For example, you can turn a good competitive deck like "Six Samurai" into a really strong deck by just adding Legendary Six Samurai Shi-En