Creating a Cube is a labor of love one that takes hours of research, playtesting, sleeving, playtesting, cutting cards, and even more playtesting
And then you can cast them for free and then they lose life equal to its cost - nasty free cards and win con and life loss to trigger our version
Im looking at Archmage Emeritus first here, a rare from Strixhaven that has a lot of potential
That's just to name a few
This is one of the two cards from Lord of the Rings: Tales of Middle-earth that completely shook up the Modern format, with The One Ring being the other card that caused a lot of metagame shifts
This said, there's a chance these cards (and other pieces from the deck like Retract) go even higher if the deck performs well at the GP level