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."

• Number: 34
• Rarity: U
• Power: 4
• Toughness: 4
• Type: Enchantment Creature
• Subtype: Nautilus
• Mana cost: 2U
• Color: Blue
• Artist: Brad Rigney