Like most Magic: The Gathering cards, the value of Elminster 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 (Commander Legends: Battle for Baldur's Gate)
If you dont know anything about EDH, you might think Boros is great
TARKIR DRAGONSTORM: GREEN Bloomvine Regent is better than most three-mana ramp in Mono-green outside of synergies with Harrow
There are only 43 PSA 10s in existence and, most importantly, only 3 BGS 10s, making this a case of popularity and rarity The ultimate combination for optimal card value worth a lot of money
Even once you've hit a critical mass of snakes, a simple 'wrath effect takes you back to square one