As Frostboil Snarl enters the battlefield, you may reveal an Island or Mountain card from your hand. If you don't, Frostboil Snarl enters the battlefield tapped. {T}: Add {U} or {R}.
NM-Mint Foil - $1.70
Lightly Played Foil - $1.50
Moderately Played Foil - $1.30
Heavily Played Foil - $1.20
Damaged Foil - $0.90
NM-Mint Foil Non English - $1.70
Lightly Played Foil Non English - $1.50
Moderately Played Foil Non English - $1.30
Heavily Played Foil Non English - $1.20
Damaged Foil Non English - $0.90