Is the MCU supervillain Sandman immortal?
Sandman can turn his body into sand and control it however he wants. His unique abilities bring him close to immortality, allowing him to survive even extremely powerful attacks.
So, the real question is: Can Sandman actually be killed?
Well, defeating him is extremely difficult because he can recover even after being completely destroyed. However, there are a few ways that could potentially defeat him.
Certain chemicals can affect sand. For example, hydrofluoric acid can dissolve it. We could trap him inside a giant container and pour the chemical over him.
Another possibility is using extremely high-energy freezing rays to freeze him. We could also try breaking him apart with high-voltage electricity.
However, Sandman controls sand using his mental energy and can shape it however he wants. It's also possible that his energy could naturally break down over time, because after all, his mind is still human.