If you cast Flight or Fight from hidden targeting a Mundo, but the opponent reveals a Tideturner to move Mundo to a different battlefield before Flight or Fight resolves, does Mundo still move to base?

Ruling: No, Mundo will be unaffected by Flight or Fight.

Nuances:

• Hidden's target restriction (same battlefield) is checked both when casting and on resolution
• Even though the restriction comes from hidden rather than being printed on the spell itself, it still applies at resolution