October 4, 2004 Wizards of the Coast
It triggers when the spell is cast, which means it becomes a creature before that spell resolves.
October 4, 2004 Wizards of the Coast
It changes into a creature even if the spell is countered.
October 4, 2004 Wizards of the Coast
When it turns into a creature, it is no longer an enchantment.
April 1, 2008 Wizards of the Coast
A "creature spell" is any spell with the type Creature, even if it has other types such as Artifact or Enchantment. Older cards of type Summon are also Creature spells.
August 1, 2008 Wizards of the Coast
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 their most recent turn. It doesn't matter how long the permanent has been a creature.