Greven, Predator Captain gets +X/+0, where X is the amount of life you've lost this turn.
Whenever Greven attacks, you may sacrifice another creature. If you do, you draw cards equal to that creature's power and you lose life equal to that creature's toughness.
NM-Mint Foil - £0.80
NM-Mint Foil Non English - £0.80
Lightly Played Foil - £0.70
Lightly Played Foil Non English - £0.70
Moderately Played Foil - £0.70
Moderately Played Foil Non English - £0.70
Heavily Played Foil - £0.60
Heavily Played Foil Non English - £0.60
Damaged Foil - £0.50
Damaged Foil Non English - £0.50