trump card pokemon Lysandre's 118/119 Holo Ultra Rare Card Near Mint Lysandre's Trump Card Reverse Holo

They do nothing against mono color decks unless Richard is building the manabase, but against multicolor decks they can often be free wins and are definitely the highest win % cards for their mana values

Spectacular ShowdownSpectacular Showdown is very similar in that you need your opponents to have a board when you play it, it's expensive and if it doesn't win you the game it leaves one of your opponents with a board full of double strikers

So the main format wizards is pushing is called standard

At the beginning of the chosen players upkeep, this artifact deals X damage to that player, where X is the number of cards in their hand minus 4

Wizards has somewhat addressed this issue with its Universes Within versions of the cards