Being able to play a 4-mana spell on turn 1 is insanely good, especially with the abilities of popular cards in the Vintage format
I'll try to get to the reasons for that later
Stormkeld Vanguard is equally potent as a creature, with or without its Adventure side
It has a sleeve for a 9-pocket binder of cool cards (which doubles as a tablet or small laptop sleeve), a side pocket with a strap (for your playmat or your water), and two exterior pockets with an abundance of space for various tokens, dice, notepads, and more
This is another card like Faithless Salvaging for me: it doesnt look like anything special, but it plays so much better than it seems
Many cards in this Universes Beyond set are commanding impressive price tags for gameplay utility, Tolkien flavor, or both, and it also helps validate the entire concept of Universes Beyond