One of my favorites is the Crypt Ghast thing, where you make all your lands tap for more than they should, or the Cabal Coffers thing, where you have some way of generating a bunch of mana using some specific combination of cards
It made the set far more interesting for enfranchised players, since they could now get their hands on some new cards, while still catering to new players
Grief became the poster child for the scam combo, where you evoked it, then used a card like Undying Malice or Malakir Rebirth before it died to put it back in play
Grave Danger (Blue-Black)
German Gorgonischer Golem Falls diese Karte durch Kampf zerstrt und auf den Friedhof gelegt wird: Die ATK des Monsters, das sie zerstrt hat, werden zu 0
There are only 16 Mantine cards in English, and criminally the Pokmon has never received a full-art card