If you hide an Action spell at a battlefield on the same turn, can you still flip it and pay its original cost, or must you wait until next turn?

Ruling: You cannot flip a hidden card and pay its original cost on the same turn you hide it. You must wait until the next turn to play it.

Sequence:

• Pay the power cost to hide the Action spell facedown at a battlefield
• Wait until the next turn
• The card gains Reaction and can be played, ignoring its base cost

Nuances:

• The hide ability specifically states "Beginning on the next turn" the card gains Reaction and can be played ignoring its base cost
• While the wording says "you may play," the timing restriction of "beginning on the next turn" prevents playing it on the turn it was hidden