Veiled Sentry
Urza's Saga — uncommon
Enchantment
Veiled Sentry rulings:
2004-10-04: It triggers when the spell is cast, which means it becomes a creature before that spell resolves.
2004-10-04: If the spell is no longer on the stack when the triggered ability resolves, the converted mana cost of the spell is still remembered.
2004-10-04: When it turns into a creature, it is no longer an enchantment.
2004-10-04: It changes into a creature even if the spell is countered.