Certain Lillie cards have high market prices due to limited availability and exclusive artwork
The Diamond & Pearl + Platinum-era Lv.X mechanic is live across thirteen distinct Sinnoh and Platinum chase pulls with the silver/ice-blue/white shimmer overlay, the HGSS-era Prime + LEGEND tiers are live, the full Black & White era ships with Full Art Pokemon-EX, Dragon-type cards (Dragons Exalted), and the first-ever Gold Secret Rares (Boundaries Crossed onwards), the XY era spans the inaugural Mega Evolution debut through Primal Clash's alpha/omega Ancient Traits and the gold BREAK Evolution cards, the Sun & Moon era debuts GX, and the complete Sword & Shield era introduces Pokmon V, VMAX, VSTAR, Radiant, Amazing Rare and Trainer Gallery cards
If it weren't as good in EDH as it was in other formats, (and it is so no worries) then it's presence as the most-played card in the game could be questioned
Why Spell Pierce instead of Negate
You can definitely get lucky, but you can also buy hundreds of packs and still not find a single rare card. With new packs costing around $10 to $15, thats a big risk, meaning you can lose a lot more money than you could gain
Finally, you can pay five mana to shuffle your library, exile the top card and then play that card for free until the end of your turn
