Can you play a hidden card immediately on the same turn you hide it, or do you have to wait until a later turn?

Ruling: You cannot play a hidden card on the same turn you hide it. You must wait until the next turn or later.

Sequence:

• When you hide a card, it goes to the hidden zone
• Beginning on the next turn after hiding it, the card gains Reaction and you may play it without paying its cost
• On subsequent turns, you can continue to play it for free with Reaction timing

Nuances:

• The ability to play from the hidden zone only exists through the specific rule that grants it beginning on the next turn - there is no general rule allowing you to play cards from the hidden zone otherwise
• The reminder text on cards reads "hide now for power to react with later for 0" which reinforces the later turn timing