When you play or reveal a unit card that was previously Hidden, does it enter the battlefield Ready or Exhausted?

Ruling: When you reveal a Hidden unit, you are playing the card just like you would play it from your hand, so it enters the battlefield Exhausted.

Nuances:

• A facedown card doesn't have a Ready or Exhausted state while Hidden
• Playing a card from Hidden works the same as playing it from hand
• The Ready/Exhausted state depends on what kind of card it is