When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)
NM-Mint - $0.90
Lightly Played - $0.80
Moderately Played - $0.70
Heavily Played - $0.70
Damaged - $0.50
NM-Mint Non English - $0.90
Lightly Played Non English - $0.80
Moderately Played Non English - $0.70
Heavily Played Non English - $0.70
Damaged Non English - $0.50