Archive of the Unthinkable

Archive of the Unthinkable enters the battlefield tapped unless you control a blue planeswalker.
{t}: Target Player adds {u}
{3}{u}{u} Sacrifice Archive of the Unthinkable:
target opponent puts the top half of their library
into their graveyard. If Archive of the
Unthinkable is tapped, put the top ten cards of
their library into graveyard instead.
"Knowledge can be quite... traumatizing."