Bane Blade Magus Arcana question

[Gallant Armor]

The Bane Blade and Planer Hunter arcana use wording that spending point(s) from the arcane pool adds the special ability to the weapon, while Devoted Blade, Ghost Blade and Throwing Magus use wording that spending a point adds special abilities to the list of options.

My question is, for Bane Blade and Planer Hunter, if you spend the point(s) to add those abilities, do they come out of the Magus' enhancement bonus allotment?

For example a level 15 Magus can add +4 using his arcane pool. If he spends an extra point to add Bane with Bane Blade, does he have +4 or +3 remaining?

Bane Blade:

Benefit: Whenever the magus enhances his weapon using his arcane pool, he may spend 1 additional point from his arcane pool to add the bane special ability to the weapon.

Devoted Blade:

Benefit: Whenever the magus enhances his weapon using his arcane pool, he may spend 1 additional point from his arcane pool to add either the anarchic, axiomatic, holy, or unholy special ability to the list of available options. A magus may only add one of these abilities if it matches his own alignment.

Ghost Blade:

Benefit: Whenever the magus enchants his weapon using his arcane pool, he may spend 1 additional point from his arcane pool to add the brilliant energy and ghost touch special abilities to the list of available options.

Planar Hunter:

Benefit(s): Whenever the magus enhances his weapon using his arcane pool, he can spend 1 additional point from his arcane pool to add the planar special ability to his weapon, or 2 additional points to add the phase locking special ability.

Throwing Magus:

Benefit(s) Whenever the magus enhances his weapon using his arcane pool, he can spend 1 additional point from his arcane pool to add the returning and throwing abilities to the list of available weapon special abilities.

[Gisher]

Gallant Armor wrote:

The Bane Blade and Planer Hunter arcana use wording that spending point(s) from the arcane pool adds the special ability to the weapon, while Devoted Blade, Ghost Blade and Throwing Magus use wording that spending a point adds special abilities to the list of options.

My question is, for Bane Blade and Planer Hunter, if you spend the point(s) to add those abilities, do they come out of the Magus' enhancement bonus allotment?

For example a level 15 Magus can add +4 using his arcane pool. If he spends an extra point to add Bane with Bane Blade, does he have +4 or +3 remaining?

He would have +4 remaining. You are correct that spending the extra point adds Bane to the weapon on top of the bonus/special abilities that spending the first point gets you.

With Devoted Blade, on the other hand, your two points could get you something like a +2 enhancement bonus and also Holy because you would have to use two enhancement points to get Holy.

[Diego Rossi]

LOL, as written the Blade Bane arcana is problematic for a Blackblade magus.

You get the arcana t level 15, so your BB is already +4, you enhance it and add another 4 points of enhancement. You add bane, a +1 ability and get a total of 9 points of enhancements.

At level 17 your BB is +5, you enhance it with your arcane pool and add another +5 point, total enhancement +10. You don't have space to add more enhancements, so you can't add bane. To be able to add it you have to "waste" enhancement points, maybe adding duplicate abilities.
(Remember enhancement are capped to +10 total, regardless of the source of the enhancement, spell, class ability or permanent magic don't matter)