One of the most iconic decks from the early history of Magic: The Gathering is "Erhnamgeddon." The deck revolves around casting cheap and efficient creatures and then dropping an Armageddon so that your opponent can't deal with your threats.
France's Bertrand Lestree finished second place in the 1996 Pro Tour with this version of the deck, though there have been many variants. The format at the time was Standard, "New York Style," where decks must have five cards from each available expansion in either the main deck or its sideboard.
Every card in the deck plays multiple roles, and its these little synergies that all add up and made it such a powerful competitor. Check it out for yourself.