There are a few key drivers behind the current Pokmon price surge: Low Print Runs for Japanese Sets Japan-only booster boxes like Black Bolt and Shiny Treasure are seeing reduced allocations and strict limits on pre-orders
Once per turn, at attack declaration, if this card attacks an opponent's monster: You can attach that monster to this card as additional Xyz Material
SR Super Rare Rocket Arrow Express X EARTH Level 10 [ MachineEffect ] ATK 5000 DEF 0 Cannot be Normal Summoned/Set
Konami Corporation / The Upper Deck Company / Kazuki Takahashi
Unlike many of the other most valuable cards in Shining Legends, this Mewtwo GX continues to go up, climbing from a previous high around $130 to its current price exceeding $150
Now if the UG lands player doesn't have a sufficient landfall threat on the board, he or she can still find value in returning their lands to hand, discarding them for value (maybe to Wild Mongrel, Noose Constrictor, etc., or Turntimber Sower, if not Trade Routes), and having options to re-play them for future landfall triggers or other shenanigans
