Weapon and Armor Proficiency
Source: Ultimate Magic, p. 49
Replaces: This replaces the normal magus weapon and armor proficiency feature.
A staff magus is proficient with simple weapons only. He can cast magus spells while wearing light armor without incurring the normal arcane spell failure chance. Like any other arcane spellcaster, a magus wearing medium armor or heavy armor or using a shield incurs a chance of arcane spell failure if the spell in question has a somatic component. A multiclass magus still incurs the normal arcane spell failure chance for arcane spells received from other classes. This replaces the normal magus weapon and armor proficiency feature.
