Invincible

From God of War Wiki

[edit] Mythology

is a power possed by gods and titans it allows the user to be Immune to most and possibly all magical attacks by a magical creature that could easily kill a human and mortals but when someone possessing this power is weakened they can be harmed or killed.

[edit] In the God of War Series

Many beings are encountered through the God of War series, from Gods to Titans possessing this power as only the Blade of Olympus can harm or kill them. When Kratos fought Zeus in God of War II, the head of Euryale had no effect on him.