Does Thousand Tailed Watcher choose targets, and do you need to pay Deflect costs when activating Watcher's ability if the opponent has a Deflect unit?

Ruling: Thousand Tailed Watcher does not choose targets when its trigger activates, so you do not need to pay Deflect costs even if your opponent has a Deflect unit.

Nuances:

• Since Watcher's trigger chooses nothing, Deflect does not apply to it