¿Who is stronger, Watcher or Black Widow?

The Watcher is a powerful and enigmatic character from the Marvel Universe, first appearing in the Marvel Comics series "The Fantastic Four" in 1963. He is a member of an ancient and advanced alien race known as the Watchers, who are sworn to observe and record the events of the universe, but not to interfere. The Watcher's story begins on the planet Uranus, where he was born as the son of a Watcher named Zoma and a mortal woman named Kymera. From a young age, the Watcher was trained in the ways of his people, and he quickly rose through the ranks to become one of the most respected and influential members of his race. As a Watcher, the character possesses a number of superhuman abilities, including strength, speed, agility, and durability. He also has access to advanced technology, including a number of powerful weapons and gadgets. Despite his powerful abilities, the Watcher is bound by his oath of non-interference, and he is not allowed to use his powers to directly interfere in the affairs of other beings. However, he has been known to bend or even break this oath on occasion, when he believes that it is necessary to prevent great harm or destruction. Throughout his long and storied career, the Watcher has observed and recorded countless events in the Marvel Universe, including the rise and fall of civilizations, the births and deaths of heroes and villains, and the struggles of ordinary people. Despite his seemingly passive role, the Watcher has had a profound impact on the Marvel Universe, and he is respected and feared by many of its greatest characters.