Do hidden cards need to target at the battlefield they are hidden at, and does targeting text change when a card is hidden?

Ruling: All hidden cards receive the additional targeting restriction of "Here" (meaning they must target at their own battlefield), except for Tideturner which cannot target at its own location due to errata.

Nuances:

• The targeting restriction is not printed on the cards themselves but is added by the rules when cards become hidden
• Tideturner is the sole exception to this rule