When Gray Merchant of Asphodel enters, 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 - $4.80
Lightly Played - $4.50
Moderately Played - $4.30
Heavily Played - $3.80
Damaged - $3.10
NM-Mint Non English - $4.80
Lightly Played Non English - $4.50
Moderately Played Non English - $4.30
Heavily Played Non English - $3.80
Damaged Non English - $3.10