If I play Tideturner as a hidden card, can I select a card outside my battlefield?

Ruling: Yes, Tideturner can select a card outside your battlefield when played as a hidden card. Tideturner is currently the only exception to the normal hidden card rules because it cannot target units at its location.

Nuances:

• Pay attention to Tideturner's errata
• The exception exists specifically because Tideturner cannot target units at its location