It sounds like you’re asking about what happened to the Witness in Destiny 2: The Final Shape. In the expansion’s story, the Guardians defeat the Witness inside the Pale Heart, ending its attempt to impose the Final Shape on reality.

What happened

  • The Witness is confronted and ultimately destroyed after the final battle in the Traveler’s inner realm.
  • Its plan to reshape existence into a single, controlled outcome is stopped.
  • The broader result is that the immediate threat to the universe is removed, though the setting is left with new consequences for the post-Final Shape era.

Simple version

If you meant the Witness from Destiny, the short answer is: it was defeated and its Final Shape plan failed.

If you meant something else

Your wording could also refer to a different “witness” in another story or article. The most likely match from current search results is Destiny’s Witness and The Final Shape.