Well, the Kobolds are, more or less, colorless (or to speak, they don't need colored mana).
There was, somewhere, an artifact which gave all your creatures the possibility to produce mana (
Springleaf Drum).
Then again, mind this: If you cast an Eldrazi while having a
Possibility Storm out, it has a high chance to polymorph into a Kobold or a similar useless creature

While when you discard an Eldrazi, they would be shuffled back into the libary, giving you the opportunity to get another one ... That's why I would refrain from making a mana ramp deck around the
Possibility Storm quest