No stroke by mortal weapon, though it pierce his very heart, may slay him.

They are immune to mortal weapons in either form.

Dizzily I wondered if she could be killed by mortal weapons.

If she can be killed by mortal weapons.

For he is a God and cannot be slain by any mortal weapon.

Some day I will have the secret of how to resist mortal weapons.

He never even felt them; it seemed he was invulnerable to mortal weapons.

It could not be killed with mortal weapons because its golden fur was impervious to attack.

How am I to fight these dead fiends, who yield not to mortal weapons?

Being a god, he is also immortal and cannot be harmed by mortal weapons, only magical ones.