Can a hidden Fight or Flight card target units at a different battlefield than where it was hidden, and does using it on your own readied unit exhaust that unit?

Ruling: When you hide a card, it gains the additional requirement that any targets must be at the battlefield where it was hidden. Using Fight or Flight on your own readied unit does not exhaust it.

Nuances:

• Hidden cards can only target units at the same battlefield where the card was hidden
• Fight or Flight does not exhaust your own units when used on them