Hidden Gibbons

Enchantment    (CMC:1)

When one of your opponents successfully casts an instant or interrupt spell, if Hidden Gibbons is an enchantment, Hidden Gibbons becomes a 4/4 creature that counts as an Ape.

When these apes want something, it's a matter of gibbon take.

104 GU • ENUna Fricker

™ & © 1993—1999 Wizards of the Coast

Legal in: Urza Block,Legacy,Vintage,Commander

Oracle Text (click to copy):

Hidden Gibbons {G} Enchantment When an opponent casts an instant spell, if Hidden Gibbons is an enchantment, Hidden Gibbons becomes a 4/4 Ape creature.

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10/4/2004
When it turns into a creature, it is no longer an enchantment.
10/4/2004
It changes into a creature even if the spell is countered.
8/1/2008
The ability triggers when the spell is cast, so it becomes a creature before the spell resolves.
8/1/2008
A noncreature permanent that turns into a creature can attack, and its  abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of his or her most recent turn. It doesn't matter how long the permanent has been a creature.

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Card Hidden Gibbons is not on TCGPlayer.