Warning: contains spoilers for Sentinels #1The explosive Sentinels #1 introduced readers to the Marvel Universe’s newest version of the monstrous mutant-hunting Sentinels, but it also brought back an ultra-powerful X-Men villain who is in major danger of being overused. The psychic entity known as Onslaught, originally the psychic combination of Charles Xavier and Magneto’s “dark sides,” is one of the 90s most iconic Marvel villains, but the power of the villain has been lessened in each subsequent appearance.
