the.com/invulnerability
The fantasy that nothing can touch you, held by everything that eventually does.
means The state of being impossible to harm, wound, or successfully attack.
from From Latin vulnerare, to wound, with the negating in-; literally unwoundable, the opposite of vulnerable.
Achilles clauseEven legendary invulnerability ships with a fatal exception.
Comic stapleSuperman is invulnerable except to a green rock.
Word cousinVulnerable and vulture share the wounding root.