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Bandeira USACrystalline NautilusIcons of mtgIcons of mtg

Bandeira BRASILNáutilo Cristalino

Bandeira ESPNautilo cristalino

Enchantment Creature — Nautilus

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."


You still control the Aura, even if it’s enchanting a creature controlled by another player.
Unlike other Auras, an Aura with bestow isn’t put into its owner’s graveyard if it becomes unattached. Rather, the effect making it an Aura ends, it loses enchant creature, and it remains on the battlefield as an enchantment creature. It can attack (and its abilities can be activated, if it has any) on the turn it becomes unattached if it’s been under your control continuously, even as an Aura, since your most recent turn began.
Similarly, if you cast an Aura spell with bestow targeting a creature controlled by another player, and that creature is an illegal target when the spell tries to resolve, it will finish resolving as an enchantment creature spell. It will enter the battlefield under your control.
On the stack, a spell with bestow is either a creature spell or an Aura spell. It’s never both, although it’s an enchantment spell in either case.
Crystalline Nautilus’s middle ability functions as long as Crystalline Nautilus is on the battlefield, whether it’s a creature or an Aura.
Auras attached to a creature don’t become tapped when the creature becomes tapped. Except in some rare cases, an Aura with bestow remains untapped when it becomes unattached and becomes a creature.