This card is the perfect blend of many things
More copies of the Umbreon Gold Star card exist than Espeon , although both are roughly estimated to have around the same value of $6,000
Its a shoe-in for cube, its great for Canlander, itll be a staple in Commander, and in Modern it gives you a whole host of options for red-based spellslinger decks
Stormfist Crusader Short, simple, to the point
Sacred Mesa gives you an extra engine for more, and Pegasus Refuge works well with the heavy drawpower this deck runs to make up for it's weak creature base, even if chucking a white card for a 1/1 flyer feels bad
A key change was making Pokemon Tool cards become their own category of Trainer rather than being lumped in as Item cards