Commander (2011) was designed as a new product for a relatively small format, while Commander 2013 wanted to shift the product a little into becoming an on-ramp for new players by offering them a deckbuilding challenge
Whip of Erebos is a suprisingly effective option given that most of our creatures have enters the battlefield effects
Each set includes two Commander precon decks built around a tribal creature theme
Its not as old as some other cards on this list as the expansion premiered in 2003, so itll probably keep going up in value
Over time, Magic standardized its terminology, and this wording was replaced with Legendary Creature
For decks like Derevi, Empyrial Tactician or Nadu, Winged Wisdom, having a mana dork on turn 1 is often better than waiting until turn 2 for a ramp spell