By tapping it and any other untapped permanent you control, you get one mana of any color
As far as R&D is concerned, it is the theme discard cards that cause the most unhappiness as discard decks are one of the scary three (land destruction, permission and discard) that tend to keep people from playing the game and thus tend to annoy players at a much higher level than other decks
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You can build a sea creatures deck around this, and it could probably work
It is definitely a slow card, but will be good enough in the later part of the game to consider taking highly This provides a bit of ramp, and then in the later part of the game it is a great place to sink your mana, as venturing over and over again is some nice value
It also offers a good chance of picking up a win against other Starters