Belles ability allows a player to put two cards per turn into an inkwell, which provides players with a potent tool for quickly building an inkwells strength and getting powerful characters onto the playing field before an opponent
A 1/2 that costs two mana, Tifa comes with Trample and a landfall ability that doubles her power until the end of turn whenever you play a mana
Theres not really an alternative that does everything it does, either, making it very difficult to replace, especially in higher brackets
Whether it's fishing, blitzball, or even playing cards (when I learned Magicked Card was a mount, I knew it had to be a card), there's always something else besides combat to do here
That is why you need to update your knowledge in this area
It makes sense that an item that gives you huge amounts of savings towards playing them would make for a very popular and powerful addition to any deck that plans to utilise them