The Baltergeist

Suspend X - {x}{p/r}{p/r}{p/u}{p/u}. X can't be 0.
Whenever The Baltergeist is exiled from
anywhere, put the top X cards of each player's
library into his or her graveyard, where X is the
number of time counters on The Baltergeist.
The Baltergeist's power and toughness are each
equal to the number creatures in all graveyards.
"I speak for the dead."