10 Most Powerful Spider-Man Villains
2. Carnage
BIf Spidey though Venom was bad, the symbiote's first offspring was far worse. After the Venom symbiote helped free Eddie Brock from prison, it left behind a small part of itself, which bonded with the closest human being there, Cletus Kasady. The pair became the Venom symbiote's first offspring, Carnage.
Eddie Brock was unhinged and angry, but he wasn't a psychotic killer when he bonded with Venom. The same can't be said for Kasady. He was a convicted killer who had no problem tearing his victims limb from limb, and with the power of the Carnage symbiote, that became far easier.
The reason Carnage is more powerful than its progenitor has more to do with Kasady's insanity than the symbiote's powers. Kasady has no moral code of any kind, and killing for him is an act of joy and pleasure, which make him entirely unpredictable and dangerous. Granted, the ability to craft any edge weapon imagineable from the symbiote's mass doesn't hurt.
Carnage was so dangerous after he showed up, Peter ended up making a deal with Venom to take him down and the two ended up working together. You know Carnage is a bad guy if it takes the combined might of two mortal enemies to take him down.