How about that Mycosynth Wellspring
Toss a Stuffy Doll into your deck and laugh
Prime pulls included: Hops Zacian ex SIR #186 A heartfelt, story-driven masterpiece valued at $250$400 raw, PSA 10s soaring higher
Well, ironically, you can grab another Beseech the Mirror and repeat the process as many times as you have Beseech copies in your deck and permanents in play to sac for each Bargain cost, which can thin your deck while building up a sizable storm count (for those of you who play or have played Yu-Gi-Oh, this line of play is reminiscent of using Toon Table of Contents to search for Toon Table Contents, to search for Toon Table of Contents, to search for Toon Cannon Soldier)
Unsurprisingly, this card's obscene value is due to its exclusivity, as this card was only distributed to World Championship competitors in 2024