Spell Mastery spontaneity casting

[yennico]

I do not know if it was an official rule but back in 3.0 a wizard do not to have memorize all of his spell slots. He can leave some spell slots open. At a later point of time he could memorize the open spell slots. To memorize one of this open spell slots the wizard needed 15 minutes time and silence.

Now I´m playing 3.5:
With spell mastery a wizard can prepare a spell without a spellbook. How much time does this preparation take?
E.g. Take a wizard level 10 with the feats spell mastery and silent spell. One of his spell mastered spells is the fireball spell.
At the morning the wizard memorizes all of his spell slots except a level 3 and a level 4 one.
At that day the wizard had to fight a bunch of undeads.
Can he cast for his open third level spell slot a fireball in middle of the fight without memorizing the fireball spell?
Can he cast for his open fourth level spell slot a silenced fireball in middle of the fight without memorizing a silenced fireball spell?

 

[Thanee]

Spell Mastery spells work the same as spellbook spells.

The only difference is, that you do not need the book.

Bye
Thanee

 

[Thanee]

In FR there is a feat, that allows you to spontaneously convert any prepared spell (like Cleric with cure spells) into a single spell chosen, when you aquire that feat, which you have to have Spell Mastery with (the chosen spell, that is). The feat is Signature Spell.

Bye
Thanee

 

[yennico]

Spell Mastery spells work the same as spellbook spells.

The only difference is, that you do not need the book.

Bye
Thanee

So this feat is only useful if somebody steals the spellbook from the mage or the mage is without his equipment (e.g. in a jail, in slavery, etc.).

 

[Patryn of Elvenshae]

So this feat is only useful if somebody steals the spellbook from the mage or the mage is without his equipment (e.g. in a jail, in slavery, etc.).

Pretty much - with the additional note that some other feats - Signature Spell, etc. - build off of Spell Mastery.

I've considered giving Wizards bonus Spell Mastery feats in addition to their normal bonus feats for precisely the reason you mention above.

1. It's not terribly useful unless the Wizard is without his primary source of power.
2. If the Wizard is without his primary source of power more often than not, he's better off being a Sorceror.