Does Crystalline Sliver currently have hexproof or shroud?
The current text of a card (called Oracle text) is always available in Gatherer. Crystalline Sliver now reads:


  All Slivers have shroud. (They can't be the targets of spells or abilities.)


Note that Wizards very strongly favors updating cards in ways that don't affect the way they work, but simply make them clearer and use more up-to-date terminology or phrasing (called non-functional errata). That's the case here: they just replaced the fully spelled-out ability with the keyword that means the same thing.