Wang's Preservation

[Shiro, Time Devourer]

4GG
Enchantment
Rare
Skip your draw step
You may play cards from your library as though they were in your hand. If you do so, reveal that card.
If a card enters your library or graveyard, remove it from the game.
Too broken? Anything needed to be fixed?

 

[Spiderman]

Looks kinda odd to me...

So does this mean once you play it, all of the cards in your library is effectively your hand?

 

[FoundationOfRancor]

I think the card is maybe too powerful for an actual card...

At the very least, it should effect both players, and maybe cost some more mana (Hopefully much if it being green)