Designing for Vintage 3: Block Mechanics
In general, these days blocks tend to be focused on such different themes that they aren’t really very compatible with each other. Using Onslaught for an example, there were no Cycling cards and very few Goblins in Odyssey and Mirrodin, the two sets that were legal when Onslaught was and thus nearly every card in those decks came from either Onslaught block or from the basic set. In Type One however, blocks never rotate out. This gives deckbuilders the ability to plumb older sets for cards which can work along with a block mechanic. Some blocks have been more successful than others because of this effect.