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 - $5.90
Lightly Played - $5.30
Moderately Played - $4.70
Heavily Played - $4.10
Damaged - $3.00
NM-Mint Non English - $5.90
Lightly Played Non English - $5.30
Moderately Played Non English - $4.70
Heavily Played Non English - $4.10
Damaged Non English - $3.00