This is something that goes beyond just the Magus: What qualifies as a melee attack here?
(I saw a thread where somebody asked if a Trip attempt would count as an attack triggering 2 Weapon Rend)
Is it just normal melee damaging attacks? What about Melee Maneuvers? They are beating Touch AC as well... Likewise, what about Touch Attacks? Why shouldn´t these work, flavor wise?
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Instead of the free melee touch attack normally allowed to deliver the spell, a magus can make one free melee attack with his weapon as part of casting this spell.
So if you Quicken a spell, you can get a free melee attack as a Swift Action. I don´t like the sound of that... Quickened Orisons and Pearls of Power (besides Spell Pool) seem like a popular way to get extra attacks that not only stack with Haste effects, but also apply to Attack Actions or Cleaves.
A free Touch Attack, which does nothing but deliver the Spell Effect is reasonable, because the movement can just be an extension of Somatic components, but a Melee Attack presumably signifies more of a physical ´dedication´ to throw one´s strength into the swing, etc.
I`d prefer to see this ability work as: delivering Spell Combat spell via normal attacks (no extra attack, as Full Round), OR as a Standard Action (also precluding Vital Strike, essentially a Standard Action version of Spell Combat only allowing Touch spells).
I think it's just saying that instead of delivering it via a harmless touch attack you can include the spell in a melee attack with a weapon. Built in Spell Storing.
It does look like you could use that with a quickened spell, but considering how many spell levels quickened adds it doesn't seem too broken really. If this was a dedicated fighter type getting an extra attack every round, might be something to worry about. As is, this is maybe a once a day trick for an extra swing.
