This is due to a number of factors, including a lack of reprints making the card more desirable, its rarity making it tougher to pull and its very eye-catching art of Umbreon, a very popular Pokmon
But I dont think many players really find that style exciting unless you can also couch it within a more multi-dimensional, coherent theme
Using the double cascade of Maelstrom Wanderer also can upgrade your board surprisingly before you attack and finish your foe off
Michiko Konda, Truth Seeker makes your opponents sacrifice permanents when a source they control deals damage to you, Saskia, the Unyielding serves as a form of player removal with dealing damage, Yidris, Maelstrom Wielder lets you cascade spells from your hand if he deals combat damage, and Gisela, Blade of Goldnight doubles damage to an opponent and halves damage dealt towards you
This would cause a massive price spike