
Midnight_Angel |

Okay, so a spell usually taking a standard action becomes a full-round action to cast when cast spontaneously and augmented by a non-quicken metamagic feat.
A spell usually taking more than 1 standard action has its castim time extended by anouther full round action (so a spontaneous extended SNA would need 1 full turn, plus 1 full-round-action).
Prize question: What happens to spells that have s shorter casting time? What about a silent Feather Fall, or an empowered Cold Ice Strike?
Do these casting times remain what they were?

DM_Blake |

OK, then let's try a different answer:
This isn't the Advice forum, or the House Rules forum. It is the Rules Question forum where we discuss the actual rules. Questioning the value of the rule or suggesting not to use the rule belongs in the other forums, not this one.
Corlindale's answer seems to answer the OP's question according to the RAW.

Bill Dunn |

I don't see why they wouldn't stay as they are.
The rules only call out A) standard action spells and B) spells that take longer than that. So there's no reason to think that spells with shorter casting times would be affected, as far as I can see.
They may not be explicitly called out, but then what do we do with the explanation that spontaneously cast spells with metamagic take longer because the megamagic needs to be applied on the fly? That's also explicitly in the rules.
It's possible that the intent is for such rapidly cast spells to be exempt from the extra casting time since they tend to be emergency spells (well, feather fall is, anyway). And it's also possible that the intent is for those spells to take more time to cast as well. If it's the former, however, offensive spells like cold ice strike may be open to unintended abuse by sorcerers.

DM_Blake |

This is covered in the Feats section where Metamagic feats are explained.
In addition to not explicitly calling out spells with less than a standard action casting time, the rules also say "The only exception [to extending the casting time] is for spells modified by the Quicken Spell metamagic feat, which can be cast as normal using the feat."
That sort of sets the precedent that really fast spells are not extended by metamagic - while it doesn't explicitly state this also applies to spells that normally take less than a standard action, what we now have is no rules to cover such spells but a precedent of rules that do cover metmagically quickened spells that sets a precedent that we can use as a guideline for naturally quick spells.