Can Charm be used to move an enemy unit to its owner's base, or only from battlefield to battlefield?

Ruling: Charm can move an enemy unit to any legal location, including the owner's base or between battlefields, as long as the unit is not moved to your own base.

Nuances:

• If the unit has a different controller than its owner, the owner's base is off limits (units can only be in their controller's base)
• If you use Charm to move a unit to base from a battlefield that says "can't move to base," the effect whiffs because "can't" beats "can," but the unit is still a valid target