If you look at the drafts in which someone is picking up the ones in two colors and the artifacts, this average is 0.16 per booster (6 cards, 2 per color not in that player's colors)
This dropped everything below it, and Crop Rotation fell off, making it number 14, but I left this paragraph here, already written, so you could see what card was next)
It's also good in Gruul power matters or Fight decks where you want to have more power from just doing your things
In other words, for an extra two mana, you can play any creature you want, depending on the state of the game and the mana that you have access to
If Dark Confidant or some other way to run away with a game were included, I would not advocate cutting all the discard