Probably, they are looking to sell the cards they don't need from draft or sealed
This is easier to help accumulate poison counters than attacking for infect damage with the potential of your opponent blocking your attack with a creature they control
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Defiant Strike: If the target creature is an illegal target by the time Defiant Strike tries to resolve, the spell won't resolve
Prices firmed up over the back half of the GX era as alt-art collecting went mainstream
Cards like [card]Glistener Seer[/card], [card]Bellowing Crier[/card], and [card]Pod Prophet[/card] help support the plan, though [card]Pond Prophet[/card] is probably the only one thats somewhat playable outside of this deck
Drawn by Pikachu-creator Atsuko Nishida, and featuring a holo-backed background, the card was a gorgeous piece of artwork that has never been replicated