Other cards, like the Basic Pokemon Unknown 91/214 from Lost Thunder has a powerful ability that has the potential to be exceptionally not fun to play against
These Prism Star cards are so powerful that you can have only one of each in your deckand to ensure that you can only use them once, they go to the Lost Zone rather than the discard pile, never to return

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[2] a side-view battle screen
This card is particularly desired by the community for the value that its ability to threaten opponent permanents brings thanks to its trample, even if the Phyrexian Obliterator gets blocked, it will still do damage that will force your opponents to destroy their valuable cards
[Metal][Colorless] Ram 30