Changes

Runes are not like gems, they are not dropped in equal amounts, they are more like [[item]]s. There are common runes, and there are runes that you'll find once in your character's life, if that often. Runes drop pretty regularly, you'll often find several a game, but only the common ones. The less common runes are very hard to find, and the rarest of them all are virtually imaginary. On battle.net or in multiplayer games, you will have a better chance of finding more runes if there are more players present in a game, as the number of players in a game increases the total items dropped.