If Thousand Tailed Watcher is played and moved to a battlefield, does a unit that is revealed from hidden at that battlefield come into play with -3 might?

Ruling: No, the hidden unit does not come into play with -3 might.

Nuances:

• Thousand Tailed Watcher only affects units that are present at the battlefield when it is played
• Units revealed from hidden after Watcher is already in play are not affected by its ability