Invulnerability

Immune to conventional forms of physical harm/damage

Superman (DC Comics)
Supergirl (DC Comics)
Superboy (DC Comics)
Doomsday (DC Comics)
Thor Odinson (Marvel Comics)
Radioactive Man (The Simpsons)
Illyria (Buffyverse)
Glorificus (Buffyverse)
Baron Samedi (Heroes)
Conner McKnight (Power Rangers: Dino Thunder)