The Vanguard format came out back in 1997 (a lot of new things that year, apparently) and introduced a completely new way to play Magic and players complained about Magic dying back then, too
This expansion set is a follow-up to the recent Japanese set Mask of Change and features fan-favorite mons like Ogerpon, the Loyal Three, and Bloodmoon Ursaluna, taking heavy inspiration from the Scarlet & Violet Teal Mask DLC
What is slightly surprising, though, is that the Special Illustration Rare variation of the Tera Charizard ex card is listed at a higher market value than the golden Hyper Rare version, despite the latter being the rarest card out of the four variations
Ken gets a lot of extra millage from double strike
Similarly released as Secret Lair bonus cards, these artworks are also both gorgeous and expensive
His Red/Purple Leader edition was so strong it warped the whole Eastern OP-08 metagame until it was shelved