At the beginning of each opponent's upkeep, that player loses X life, where X is the number of cards in that player's hand minus the number of cards in your hand.
"After four thousand years, you learn to plan for betrayal."
—Urza
NM-Mint - $0.20
Lightly Played - $0.20
Moderately Played - $0.20
Heavily Played - $0.20
Damaged - $0.20
NM-Mint Non English - $0.20
Lightly Played Non English - $0.20
Moderately Played Non English - $0.20
Heavily Played Non English - $0.20
Damaged Non English - $0.20