Why make them skip the draw phase? That seems unnecessarily harsh, and also will be hard to remember, because it's not the main function of the card.
The original card was a Memory Lapse++; I added the "or permanent"in as I posted it. Guess I shoulda me that its own card. Also, I should up the cost, considering it's on par with Plow Under.
Rollback
3UU
Instant
Put target spell on top of its owner's library. Its controller skips his or her next draw step.
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Aether Twister
3GUU
Instant
Target spell or permanent's owner shuffles it into his or her library.