Hidden Gibbons

Oct 4, 2004 · It changes into a creature even if the spell is countered.

Oct 4, 2004 · When it turns into a creature, it is no longer an enchantment.

Aug 1, 2008 · A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.

Aug 1, 2008 · The ability triggers when the spell is cast, so it becomes a creature before the spell resolves.