¿Who is stronger, Whis or Onslaught?

Whis is a prominent character in the "Dragon Ball" series, serving as the angelic attendant and martial arts master to Beerus, the God of Destruction for Universe 7. First introduced in the film "Dragon Ball Z: Battle of Gods," Whis is depicted with a serene demeanor, light blue skin, and distinctive white hair. As an angel, he possesses extraordinary abilities, including Ultra Instinct—a state of heightened reflexes and movement. Whis is responsible for training both Beerus and Goku, aiding them in mastering advanced combat techniques. Despite his calm and composed nature, he exhibits a fondness for Earth's cuisine, often indulging in various delicacies during his visits. His character adds depth to the series by exploring themes of divinity, mentorship, and the balance of power within the universe.

Onslaught is a comic book character created by Marvel Comics and is known to be one of the publisher's most powerful and feared villains. He is a cosmic being created by merging the minds of Charles Xavier and Magneto, two of Earth's most powerful mutants. Onslaught has a number of supernatural powers, including the ability to manipulate people's minds and behaviour, superhuman strength and the ability to manipulate magnetism. He is also virtually indestructible, making him a formidable foe for any hero who confronts him.