Lost Underground
Beneath the Sands#75 (x1)
When Revealed: Flip the Search objective to Off Track. While Lost Underground is in play, the Search objective cannot flip. (Do not resolve the Track keyword.)

Response: When this stage is defeated, flip the Search objective to On Track and ignore its Forced effect until the end of the phase.

You've lost your way underground. You must retrace your steps to get on track.