Veiled Sentry | Magic: The Gathering
Formats Veiled Sentry is Legal in
Official Oracle Text for Veiled Sentry
Official Rulings for Veiled Sentry
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.
10/4/2004 : It triggers when the spell is cast, which means it becomes a creature before that spell resolves.