Can you exhaust Miss Fortune's Legend card as an action at no cost, and is her Champion card's 'Friendly units may be played to open battlefields' passive always active when she's faceup on the field?

Ruling: Miss Fortune's Legend card can be exhausted for free, but only on your turn in an open gamestate (when you could play a unit or perform a standard move). Her Champion card's passive allowing friendly units to be played to open battlefields is active as long as she is anywhere on the board (any battlefield or base), but not when she's in the Champion Unit Zone at the beginning of the game.

Nuances:

• The Champion Unit Zone is not technically your hand, but units there are not in play so their abilities are not active
• An "open battlefield" is understood to mean a battlefield with no units at it, though this term is not formally defined in the Comprehensive Rules