Previously, Legendary Foil cards were seen as the rarest but now we know that the Enchanted Foil cards will now be the cards everyone will want to pull
Beyond that, it taps for colorless, or you can pay 1 life to generate one mana of any color, making it a flexible piece in almost any deck
They spend a good chunk of the game catching frogs in Qu's Marsh (there's even a golden frog sidequest), while their main battle ability is actually "Eat" - consuming weakened enemies to learn Blue Magic (enemy skills)
You can exert the Map of Treasure Planet to pay one less ink for your next location, but the real power comes from the second ability
This can be a nice late-game surge in lore, making it easy to overtake a faster opponent and steal the win
When combined with cards that benefit your opponents a little too much or even more than yourself, Tataru Taru is an incredibly cheap way to even the playing field for only two mana