Bestow {3}{U}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) When Crystalline Nautilus becomes the target of a spell or ability, sacrifice it. Enchanted creature gets +4/+4 and has "When this creature becomes the target of a spell or ability, sacrifice it."
Near Mint - $0.50
Lightly Played - $0.47
Moderately Played - $0.38
Heavily Played - $0.30
Damaged - $0.20
Near Mint Non-English - $0.50
Lightly Played Non-English - $0.47
Moderately Played Non-English - $0.38
Heavily Played Non-English - $0.30
Damaged Non-English - $0.20
Foil Prices
Near Mint Foil - $0.50
Lightly Played Foil - $0.47
Moderately Played Foil - $0.38
Heavily Played Foil - $0.30
Damaged Foil - $0.20
Near Mint Foil Non-English - $0.50
Lightly Played Foil Non-English - $0.47
Moderately Played Foil Non-English - $0.38
Heavily Played Foil Non-English - $0.30
Damaged Foil Non-English - $0.20