Predictive Pool

Look at the top five cards of target player's library.
You may exile one of those cards. Then, return
the remaining cards to the top of that player's
library in any order.
{3}{u}{u}: This card's name becomes the name of
your choice until end of turn. Your opponents
cannot cast spells with that name this turn.
Activate this ability only if Predictive Pool is in
your graveyard.