shiny umbreon pokemon card GX Full Art Hidden Fates #SV69 PSA 9 Attack 2 Shiny Bubble Umbreon VMAX Premium

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They not only ramp you in up to three colours, they also have the exalted keyword, making your creatures an itty bit more effective when they attack alone.

Its currently one of the most expensive cards in the set and with good reason

The second most valuable are the Kanto starters, Charmander, Bulbasaur, and Squirtle