Hardness

The inscribed object becomes sturdier and more powerful.

Once you reach 10th level in this class, the sigil’s bonus doubles.

Armor or Shield. The creature wearing or wielding the inscribed object gains a +1 bonus to AC, to a maximum bonus of +3 if the object already has a magical property that grants a bonus to AC.

Weapon. The inscribed object grants a +2 bonus to damage rolls made with it.