What happens when Hextech Ray is used on a 6 might unit with Zhonya's Hourglass, then Thousand Tailed Watcher is played afterwards?

Ruling: After Watcher's trigger resolves, the unit (now 3 might with 3 damage) will be healed and recalled to base by Zhonya's Hourglass. It will stay at 3 might until end of turn.

Sequence:

• Hextech Ray reduces the 6 might unit to 3 might and deals 3 damage
• Thousand Tailed Watcher is played and its trigger resolves
• Zhonya's Hourglass activates, healing the unit and recalling it to base
• The unit remains at 3 might until end of turn