Back to Basics (Urzas Saga, 1998) This is a card that shuts down nonbasic lands by preventing them from untapping and the first of two land hate cards from Urza's Saga that made this list
Delney could be the start of a new resurgence of the white weenie archetype that sees a lot of cheap creatures flooding the board to win
They are exiled end of combat, so it's a one trick pony, but this is very powerful and worth the exiling
You could even play Lookout , gather information on your opponents hand, cast Hyter Sprites to stall your opponent, follow up with a Feast for Crows then play Sinkhole to further stall your opponent and even put them at a severe disadvantage
You gain life equal to that cards power
Gold Star Umbreon Like many other rare Pokmon cards, this was available in Pop Series 5 in limited quantities and could not be bought in the store