Now, there are a couple drawbacks. First and foremost is that it is a 2/2 for 4, albeit it's colourless mana. Second, it's an artifact, meaning that it's more vulnerable due to it being exposed to both kill and smash spells. However, the fact that it's an artifact can work in this card's favour. It can go into any deck because it's not colour-reliant.
Pros: Colourless, card draw/discard without tapping
Cons: Initially weak, vulnerable to artifact destruction