Benefit: The magus can use his spell combat class feature with a natural attack of his choice. If he does, he gains a +2 bonus on concentration checks. If the natural attack is made with an appendage that would normally hold a weapon (such as a claw attack), the magus cannot wield a weapon in that appendage while making natural attacks with it. If the natural attack is a bite or other attack that does not require a free appendage to make, the magus can use the natural attack in addition to all of the attacks he could make with his melee weapon, if he has one.

A magus can select this arcana more than once. The bonus on concentration checks does not stack. Each time he selects this arcana, he selects another natural weapon. For example, a magus could select this arcana twice, choosing claw attacks and bite attacks. This would allow him to use a full-round action to make all of his claw attacks with his free hand and all of his bite attacks in addition to casting a spell. This arcana otherwise functions exactly like the spell combat class feature.