Magic Links
A few useful sites for Magic:The Gathering
Gatherer - The Gatherer is the official encyclopedia of Magic cards maintained by WotC. Extensively indexed, so if you want every goblin card ever produced, plus every card with the word goblin in it, it is but a search away. I used it a great deal to look for specific effects I wanted to add to my deck.
These three cards are very, very rare, The Garfield Rarities.