When using Hostile Takeover on a unit and then using Retreat on it, which hand does the unit go to and who gets the ramp?

Ruling: The unit returns to its owner's hand (not the controller's hand), and the owner channels 1 rune exhausted.

Nuances:

• The player who cast Hostile Takeover is the controller of the unit, but not the owner
• Retreat specifically uses the term "owner" which means the original owner of the card, not the current controller