Mana Drain deserves mention as a strict upgrade, but Counterspell is legal in more formats and more pivotal in the formats where it is legal
Overall, this is a pretty classic case of a run in the market sparked more from supply-side pressure than actual demand
Green Regal Behemoth Regal Behemoth is a very powerful but inconsistent card
Leverage the Secondary Market If you miss out on an exclusive cards initial release, the secondary market can be a valuable resource
6 Teysa, Opulent Oligarch (Rainbow Foil Serialized) Murders at Karlov Manor Market Price: $897.50 The most valuable card from a Standard format-legal set in 2024 is this double rainbow serialized version of Teysa, Opulent Oligarch from Murders at Karlov Manor, clocking in with a price tag just under a staggering $900
O-Kagachi, Venegful Kami [Dragon]: Someone at Wizards proposed a Return to Kamigawa block, lost the fight, and here is one of those creatures