To make things even simpler, I'm only including the English sets of 2025, so no Mega Dream ex here unfortunately (although, pretty sure that would take home all of the awards)
1x ST26 Purple Monkey D
The most expensive of the bunch, Ifrit (Fury) is currently just shy of $600
Cubic Omen (YGOrg Translation) This is the least effective support card of the bunch, but it is a Normal Trap with a non-targeting negation capability and a GY effect that gives a Cubic monster additional burn damage when it destroys monster(s) your opponent controls that had a Cubic counter
Sakura Superstar With spring came the Sakura Superstar drop, featuring a mix between a meaningful reprint in To start, the Secret Lair sold out almost instantly, which began to rapidly increase secondary market prices
This means, if your opponent plays Thoughtseize, they can take your modal land because, while in the hand, the card is considered a nonland