Just what the title says. I came up with an arcana that i feel fits. does this seem balanced?
Arcane evasion (Ex)
Prerequisite: None
Benefit: By expending one point of her arcane pool the magus gains evasion for one Minute. If she already posesses evasion she instead gains improved evasion. A Magus over 10th level may spend an aditional point of her arcane pool in order to gain improved evasion.