Like most Pokmon cards, the value of Ursaring depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (BREAKthrough)
That said, if you get a land that has a dual basic land type, like Breeding Pool, which is both a Forest and an Island, you can still get that green mana if you need it
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Storywise, Wilds of Eldraine is also the first new Magic: The Gathering set since the Phyrexian Invasion of the Multiverse
Furthermore, assuming the trend holds, this card's Japanese version is a safer bet to maintain its value than its counterpart in Prismatic Evolutions
For one life and exiling a blue card from your hand, you can straight-up counter any spell your foe throws your way thats it