10 Most Powerful Spider-Man Villains

Flint Marko was just a run-of-the-mill thief on the run from the cops when an accident that could only happen in comic books happened to him. While taking refuge, a nearby nuclear explosion exposed him to intense amounts of radiation while he was standing on sand.

The radiation coupled with the sand to alter his form into one that could alter his size, shape, and density at will... so long as he was composed of or using sand to do it. When he first appeared, he was easily defeated (Spidey used a vacuum cleaner), but over the years, he has grown in strength.

Sandman has the ability to completely alter his size and density, given enough sand to work with. This means that he can become a gigantic abomination capable of hardening his form to the strength of concrete. This makes him both incredibly strong and durable. If damaged, he can reform himself with nearby sand, which makes him pretty much immortal.

Sandman does have a few weaknesses that can bring him down in a fight. Water causes him to crumble apart much like a sandcastle on the beach, but he's overcome this on several occasions. Despite this flaw, he is easily one of the strongest villains to go up against Spider-Man.