What does synergy mean in Magic?

Synergy, the word, comes from a Greek root meaning "working together." In Magic, synergy is simply the concept that certain cards are more effective when played with certain other cards. The cards, generally speaking, can function alright in and of themselves, but because of this synergy, produce more together than what they could when taken in isolation. Another word people use to describe this relationship between cards is 'combo.' Now let's take a look at a couple of my commanders and some of their more notable synergistic cards.