Ill go over a few examples of why some specific cards have been banned: Treasure Cruise + Dig Through Time [mtg_card]Treasure Cruise[/mtg_card] and [mtg_card]Dig Through Time[/mtg_card] are examples of cards that were individually too powerful for Modern (amongst other formats)
Fast mana almost defines Commander, especially as Sol Ring is a stalwart of the format and is also more powerful than many cards that are banned in the format
kuriouz_ @mirandaferriss these are all proxy cards, they do not make gold printed cards kuriouz_ @mirandaferriss but the proxy files are the 100% authentic files straight from the Pokemon website mirandaferriss @kuriouz_ pardon my ignorance
Lumra, Bellow of the Woods Lands always matter, but with Lumra, Bellow of the Woods, they can really matter
Psy Shadow allows you to place an extra Psychic Energy on the Pokmon in the active spot which is necessary for Psydrive as it costs 4 energy and discards two energy per use
5 Pikachu ex - 238 Surging Sparks - $487.27 One of the newer additions to valuable ex cards, Pikachu ex from Surging Sparks brings the electric mouse to the tera era with some powerful abilities