Text (ET+errata): Target player can't play land cards this turn if {R} was spent to cast ~this~ and can't play creature cards this turn if {W} was spent to cast it. [Oracle 2009/07/08]
This is not a counterspell. Any creature played prior to this spell will still resolve normally. [Eventide FAQ 2008/07/08]
This does not stop effects that "put a card into play". [Eventide FAQ 2008/07/08]
