Does moving a unit cause it to become an invalid target if the targeting card doesn't specify the zone?

Ruling: Moving a unit does not make it an invalid target if the targeting effect has no location restrictions. Target legality is checked again on resolution, which includes location-based restrictions.

Nuances:

• If an effect specifies a zone (like Void Seeker which targets the void), moving the unit to a different zone makes it invalid
• If an effect has no zone restriction (like Singularity), moving the unit keeps it as a legal target as long as it remains on the board