It's a frequently-used card in all manner of decks that use green and blue
Pokemon TCG: The Pokemon Company International utilizes basic rarity symbols (circle for Common, diamond for Uncommon, star for Rare) but quickly escalates into a dazzling array of Holo Rares, Reverse Holos, and various "Ultra Rare" categories that have evolved over the years (e.g., EX, GX, V, VMAX, VSTAR, and the current 'ex' cards)
The opportunity cost to run this in blue decks is very low, since its a blue land with no downside
But it is generally acceptable to use proxies in casual games with friends
But the second they meet with some players penchant for trying to break anything and everything they can in this game, it turns out that these mechanics can become insanely broken
If you drew poorly early on and the mulligan didnt help, she could be clutch