Cooperative Metamagic and Use Magic Device

[StormTAG]

I couldn't find the Ask a Simple Question, Get a Simple Answer thread on this board, so here we go anyway.

Can an Incantatrix use the Cooperative Metamagic ability to modify a spell that a character casts via Use Magic Device. Example: Rogue wants to cast Gravestrike from a scroll. Can the incantatrix modify the spell with the Persistent Spell feat so the Rogue can sneak attack undead for the whole day?

[Halinn]

The Ask a Question board is in another castle.

[X-Codes]

Here's the answer, which should stick with the thread once it gets moved: No.  Cooperative Metamagic has you help someone else cast a spell.  Activating a spell completion/spell trigger item is definitely NOT casting a spell.

[Bearchucks]

Cooperative Metamagic, no--items, even scrolls, aren't actual casting, and thus aren't valid.  Metamagic Effect, yes.  It's a spell effect that's in play, thus you can mess with it that way.  Hope that explains it sufficiently.

[StormTAG]

Could Metamagic Effect affect spells that the Incantatrix did not cast? In my example above, if the rogue cast Grave Strike from a wand or a scroll using UMD, could the Incantatrix use Metamagic Effect to persist it?

[Mooncrow]

Could Metamagic Effect affect spells that the Incantatrix did not cast? In my example above, if the rogue cast Grave Strike from a wand or a scroll using UMD, could the Incantatrix use Metamagic Effect to persist it?

Metamagic Effect says that it applies to "a persistent spell effect that is already in place" - there are no requirements in regards to who cast it.

[StormTAG]

Swifty. Might need to make some scrolls of ___strike for the party rogue. Persist those bad boys for all day undead or golem stabbing.