I think people might be underestimating the power of this card's ability to manipulate the enemy's draw - so long as you have a constant source of 
, it is possible to deny combo decks their necessary draw
This is indeed powerful.
and noncombo decks can easily be screwed out of an extra source of damage (creature)
Assuming a deck with 50% creatures and 50% pillars, you would be trading half of his creatures for pillars to begin with. But he starts with 3 creatures in his hand, and you can't do anything about those. As the game goes on, he gets all those creatures back (if he's still alive). So which would you rather have, this card, or a fog shield? Personally, I would go with the fog shield since it has no upkeep and doesn't compensate him with pillars. This card plus some CC might work all right, but that is more slots than 3 fog shields (or 6 dim shields).
With rewind, it is more powerful, since it mostly gets rid of the disadvantage of rewind, and turns it into a killed creature for 1
. But this is similar to the squid/shockwave combo (but slightly more efficient, and this card always has utility, and rewind is usually better than shockwave).
I think it would be more powerful against the splash of PC/CC that many decks use. If your opponent only has 3 PC, you can pretty much deny it since, their chance of drawing it goes from 10% to 1%.
So this is a pretty obnoxious card. Essentially, it encourages vanilla mono aether, since mono aether doesn't need to splash anything, has duplicates of its shields, and duplicates of its creatures that can't be rewinded. I guess you could deny the lobotomizer (unless it comes out first). It discourages combos (read fun), encourages boring rushes, discourages splashing PC or shields (more mono aether and boring rushes for the meta game).
