Invulnerability

Invulnerability: Grants 5 DR/Magic
 * Price Modifier: 3
 * Robe of Invulnerability: level 4
 * +1 Fullplate of Invulnerability: level 6

Creatures start wearing magic (+1 enhancement bonus) weapons around CR 12, and bosses earlier.

SEEMS TO BE BROKEN AFTER UPDATE 9