For an upcoming campaign I'm planning on playing a Magus. In the Magus spell list the spell Warding Weapon allows a magus to cast spells without provoking AoOs even while not casting defensively. The spell requires a weapon the magus is proficient in as a focus and the description reads:
Components V, S, F (one melee weapon you are proficient in and you are holding)
The focus of this spell flies upward above your head and takes a defensive position within your space. It lunges at opponents, as if guided by a martially trained hand, parrying and turning back melee attacks aimed at you, but does not strike back at any opponent nor does it damage them. The weapon serves only as a defense. While it protects you, you can cast spells without provoking attacks of opportunity, without the need to cast them defensively. A creature with the Disruptive feat can easily bypass this spell’s defenses. You provoke attacks of opportunity for casting spells against these creatures even when subject to this spell, though you can still choose to cast defensively.
My question is: Can I still use that same weapon to make melee attacks throughout the duration of the spell? Nowhere in the spell description does it say that I cannot, and RAW for material components states that focus items are not consumed in casting spells that require them. Will I have to adjust my budget to buy another sword to use for this spell, or is the flavour description just flavour?