You must choose an existing creature type, such as Ox or Coward. You can't choose card types (e.g., artifact), supertypes (e.g., snow), or noncreature subtypes (e.g., Aura).

Haunting Voyage doesn't target any creature cards. You choose the creature type as Haunting Voyage resolves, then you choose up to two creature cards of that type to return (or all of them if Haunting Voyage was foretold).