Random Card of the Day #109:
Fertile Ground - 1G
Enchantment - Aura
Whenever enchanted land is tapped for mana, its controller adds one mana of any color to his or her mana pool.
I like this card. I actually own a copy of it in the Invasion set art. I'm sure how I got it, because it definitely wasn't through trading, and I feel I would have remembered pulling this in a pack.
So the obvious card to compare this to is Rampant Growth. It cost 1G, and provides an additional mana. Rampant growth can fetch out any basic land, which effectively makes it any color. However, Fertile Ground trumps that by being any color that you want at the moment you need it. Once you rampant growth, the color you grabbed is "set in stone" if that makes any sense.
The other important thing is that the land enters the battlefield tapped with Rampant Growth, which means that your "missing color" is not available for use until the next turn. If you control three or more lands with Fertile Ground, you can tap lands, and then cast it on your untapped land for an immediately available missing color mana. Trading two mana for one mana of a specific color has been very relevant in many of my games, which is probably why I hold Shimmering Grotto in such high regard. But this card is slightly better because the next turn when everything untaps, you have netted and extra mana over another mana-fixer.
It may be fairly near-sighted to say "this card is good because it is strictly better than Rampant Growth." (Which it's not--considering Sweep effects, or Domain effects, or if your opponent plays Sinkhole or Stone Rain.) But this card is really good. Like, really good. I would like to say it has an avid number of uses, but really, it's just mana ramp of any color when you look at it from afar. But it's still a great card. 4/5