Arcanist Metamixing exploit and Quicken Spell, what happens?

[Brenden Falke]

What happens if I use metamixing to apply Quicken Spell to a spell?

Metamixing wrote:

The arcanist can expend 1 point from her arcane reservoir to add a metamagic feat that she knows to a spell as she casts it without affecting the casting time (though using a higher-level spell slot as normal). She can use this ability to add a metamagic feat to a spell that she prepared using a metamagic feat, although she cannot add the same metamagic feat to a given spell more than once.

Quicken Spell wrote:

Casting a quickened spell is a swift action. You can perform another action, even casting another spell, in the same round as you cast a quickened spell. A spell whose casting time is more than 1 round or 1 full-round action cannot be quickened.

Read as written it appears nothing happens beyond the level increase, because metamixing says "add a metamagic feat that she knows to a spell as she casts it without affecting the casting time", but it feels like metamixing was intended to allow you to apply metamagic feats without the increase in casting time, and the whole point of Quicken Spell is to affect casting time. I guess this also applies to Spell Perfection, which contains a similar casting time clause.

What happens?

[Gray Warden]

Metamagicked spells cast by an Arcanist require a full round action like a Sorcerer. The Metamixing exploit doesn't increase the casting time. Therefore Quicken Spell works as usual.

[Brenden Falke]

Gray Warden wrote:

Metamagicked spells cast by an Arcanist require a full round action like a Sorcerer. The Metamixing exploit doesn't increase the casting time.

I understand that. My question is what happens when I use metamixing to apply the metamagic feat Quicken Spell.

The effect of quicken spell is: shorter casting time. Metamixing says: the metamagic feat does not affect casting time. Only one of these two can be true.

[Gray Warden]

That line is there just to tell you that you don't have to increase the casting time as usual. Quicken Spell makes it a swift action, with or without the exploit.

[Chet]

Gray Warden wrote:

Metamagicked spells cast by an Arcanist require a full round action like a Sorcerer. The Metamixing exploit doesn't increase the casting time. Therefore Quicken Spell works as usual.

Advanced Class Guide page 9 wrote:

Like a sorcerer, an arcanist can choose to apply any metamagic feats she knows to a prepared spell as she casts it, with the same increase in casting time.

Since an Arcanist can already apply a Metamagic to a spell as she casts it, the purpose of the Metamixing Exploit is doing so without increasing the casting time. Otherwise the Exploit wouldn't do anything.