Spontanious Casting and Spellbooks - Can it ever work?


Homebrew and House Rules


Perhaps it's a naive dream, but hey, anythings possible in Pathfinder right?

The idea is a Spellcaster who uses a a spellbook but can cast any spell from his book. I realize this would clearly be overpowered as a base class, overwhelming both sorcerer and wizard, but what kind of drawback could make it balanced?

My first though is a prestige class, a sorcerer/wizard combo as a prereq, that gains the ability after X levels in the prestige class. But that might be my inner 3.5 talking. I thought maybe some kind of feat, but that seems overpowered for just one feat, maybe a serious of feats like the prereqs to get Spring Attack. Maybe a 20th level wizard could take a feat to allow it.

Any thoughts? Optimism please, I want ideas on how to make it possible and balanced, cuz I already see how 'improbable' it is.


I do not know about the cost but:

Instead of allowing spontaneous casting of all spells in the spellbook how about allowing to pick certain number of spells from the spellbook which you can cast spontaneously that day? Would not be as powerfull so might be easier to accomplish without a huge power boost.

RPG Superstar 2012 Top 16

Monte COok's Magister does this.

They can prepare spells, and cast any of the spells they have in memory with their spell slots. The kicker is they can build up a lot of spells in memory, but generally have fewer casting slots to play with.

In other words, an Int class has versatility, but not power.

==Aelryinth


I don't like the idea. Wizards, even with the guidelines in place, are one of the most powerful classes in the game (in my opinion) and such rules will make them even more so.

That said, however, you could have him prep spells as normal. He can, however, access any other spell in his spellbook at the cost of his health, i.e. 3 x spell level (or something appropriate) in hit points if it's not a normally memorized spell.

Silver Crusade

You can make a sorcerer, get a spellbook, and get that item that lets you cast from a written source without expending it (from UE). Boom, spontaneous with a spellbook. Sorry I can't remember the name of the item, think it was robes of some kind.


Or maybe spells can be cast from the spellbook but with a way longer casting time. That way it won't overpower the wizard during combat but all spells will be available in case they are needed and enough time is provided.

Grand Lodge

Aelryinth wrote:

Monte COok's Magister does this.

They can prepare spells, and cast any of the spells they have in memory with their spell slots. The kicker is they can build up a lot of spells in memory, but generally have fewer casting slots to play with.

In other words, an Int class has versatility, but not power.

==Aelryinth

The other important thing to consider is that the setting uses spells which on the whole are weaker than the standard D20 SRD set.


artificer wrote:
Or maybe spells can be cast from the spellbook but with a way longer casting time. That way it won't overpower the wizard during combat but all spells will be available in case they are needed and enough time is provided.

One would need to seriously boost the times or wizards would still outshine almost everyone even outside combat.


Belle Mythix wrote:
artificer wrote:
Or maybe spells can be cast from the spellbook but with a way longer casting time. That way it won't overpower the wizard during combat but all spells will be available in case they are needed and enough time is provided.

One would need to seriously boost the times or wizards would still outshine almost everyone even outside combat.

I agree that is why I suggested a casting time. If for example an invisibility spells has a casting time of 1 round but the same spell has a 1 hour uninterrupted casting time from book the wizard will be limited on how many times he can use it unprepared.


artificer wrote:
Or maybe spells can be cast from the spellbook but with a way longer casting time. That way it won't overpower the wizard during combat but all spells will be available in case they are needed and enough time is provided.

I forsee a lot of sundered spellbooks, which isn't necessarily a bad thing. =)


Riuken wrote:
You can make a sorcerer, get a spellbook, and get that item that lets you cast from a written source without expending it (from UE). Boom, spontaneous with a spellbook. Sorry I can't remember the name of the item, think it was robes of some kind.

Page of Spell Knowledge:

This page is covered in densely-worded arcane or divine magical runes. It contains the knowledge of a single arcane or divine spell (chosen by the creator when the item is crafted). If the bearer is a spontaneous spellcaster and has that spell on her class spell list, she may use her spell slots to cast that spell as if it were one of her spells known. A page of spell knowledge is priced based on the spell’s cleric or sorcerer/wizard spell level, unless the spell doesn’t appear on either of those spell lists, in which case it is based on the highest spell level as it appears on any other spell list. For example, a spell that is on the 4th-level inquisitor list and the 2nd-level paladin list is priced as a 4th-level spell.

Going this route would be SERIOUSLY expensive, though, as the cost of a single page is (X * X,000g), where X is the level of the spell in question (so a 4th level spell would cost 4 x 4,000g = 16,000g). I don't even want to begin to fathom how much it would cost to make a proper spell book made entirely out of Pages of Spell Knowledge.


Another benefit is that this don't change current rules. Is just a table of from book casting times. So everything else remains the same.

Silver Crusade

Maybe take a sorcerer and give it a bloodline that grants it a spellbook as a replacement for bloodline spells and arcana. The spellbook is in addition to the spells known, but only contains the spells known to the sorcerer to start. Additional spells can be scribed from scrolls and other spellbooks. The sorcerer can spend 2 spell slots to cast a spell from the spellbook that he/she doesn't "know", but must have the book in hand to do so. Throw in scribe scroll as a bloodline feat and spellcraft or linguistics as bloodline skills.

Sorry I'm stuck on sorcerer here, it seems to be the easiest base class to modify from.

RPG Superstar 2012 Top 16

LazarX wrote:
Aelryinth wrote:

Monte COok's Magister does this.

They can prepare spells, and cast any of the spells they have in memory with their spell slots. The kicker is they can build up a lot of spells in memory, but generally have fewer casting slots to play with.

In other words, an Int class has versatility, but not power.

==Aelryinth

The other important thing to consider is that the setting uses spells which on the whole are weaker than the standard D20 SRD set.

mmm, hadn't really noticed that.

The ability to pick elemental types on the fly as a base ability, the 2nd or 3rd level spell that makes weapons touch attacks, Calling Down the Moon to completely recharge your spell slots...

Hmm, no, hadn't really seen that facet of the campaign world. :)

==Aelryinth

Dark Archive

I created a house rule in my games that allows spontaneous casters to use the same mechanics a wizard does to learn a new spell and copy one in his spellbook as for a sorcerer to learn a new spell in place of another one. So for example, a sorcerer would spend x amount of gold (depending on the spell level) and would make spellcraft checks and take a certain amount of time. Then he would swap out the spell he just learned for an equal level spell.

For example

A sorcerer knows magic missile, mage armor, ray of enfeeblement, and summon monster 1. Now the mission he's about to embark on is going to be heavy ROLE play and would like to know Comprehend Languages. Now, he could either barrow another spellcasters book that contains the spell, buy a scroll (25 gp), or pay to borrow a spellbook. Then he must buy reagents to learn the spell (10 gp for a 1st level spell) the same cost as writing a spell into a spellbook, make a spellcraft check to understand the spell (DC 16), and then requires an hour of study (30 min for cantrips). If this was studied from a scroll, the scroll is consumed in the process. He then choose to forget summon monster 1 for comprehend languages. If he ever wants summon monster 1 back, he has to go through the whole process over again.

The rules I based them off of are in the magic chapter of the core rulebook Chapter 9.


Wow, great ideas y'all, I wasn't expecting quite a response.

I think my favorite idea so far is the sorcerer with the alternate bloodline and extented casting times for spellbook spells, it has all the flavor I'm looking for and 'seems' fair, I'll surely have to gametest it. My downfall was attempting to modify the wizard is some way to make it happen, I never thought to use sorcerer as the base concept.

Thanks again to all!


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I have a player who achieved this theme with the arcane bloodline, a spellbook as his arcane bond, and scribe scroll. Basically he packs a bunch of scrolls as his "spellbook" and his spells known reflect the spells he has "mastered". Otherwise he needs to look it up.

I quite like it.

Lantern Lodge

Riuken wrote:

Maybe take a sorcerer and give it a bloodline that grants it a spellbook as a replacement for bloodline spells and arcana. The spellbook is in addition to the spells known, but only contains the spells known to the sorcerer to start. Additional spells can be scribed from scrolls and other spellbooks. The sorcerer can spend 2 spell slots to cast a spell from the spellbook that he/she doesn't "know", but must have the book in hand to do so. Throw in scribe scroll as a bloodline feat and spellcraft or linguistics as bloodline skills.

Sorry I'm stuck on sorcerer here, it seems to be the easiest base class to modify from.

Take a look at the learned sorcerer archtype, it is almost the same as what you said.

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I include in my games a houserules that you can cast from a spellbook or other reference but it takes longer and a successful spellcraft check (DC 15+ double spell level + 4 if not intimately familier with the writing) if successfull you expend an appropriate spell slot and the spell is cast. If for any reason you need to make a concentration check or lose the spell, +10 to that checks DC. Also you can only take 5' steps during those rounds. Cannot apply metamagic feats except silent spell.

Generally a SA spell would become 2-3 rnds

This way a surprised party can defend the wizard while he tries to cast that special something but if he gets hit it becomes difficult, and with two rounds of holding a spellbook out and focusing on it, not many won't notice.


@ Evil Lincoln:
But does he use the cost for copying spells or for scribing scrolls to add to his spellbook, and are the 'scrolls' expended when he casts them? Assuming the initial, thus making them permenent not expendable, it sounds quite effective. How does he play, not overpowered or whatnot?

Lantern Lodge

Only had someone make use of it in one game, didn't seem OP but my GMing style is difficult for that. I am spontaneous and tend to adapt my encounters to what you put out rather then what your sheet says, but it helped him most with utility spells out of combat (in a heavy magic world this seemed fine)

The first method was used, the second method is just refluffing the existing rules for scrolls.


Lot of good idea for alternate versions of sorcerers.

If you want to go the other direction, and start with a wizard but make him more spontaneous, how about something based around the "arcane bond" bonded item but expanding it?

Archtype: Bonded mage

Requirement: must have a bonded item as your arcane bond

Advantage: Instead of your bonded item giving you 1 spell/day of your choice, it will now let you cast 1 spell/day of each spell level you know. For example, if you are a level 6 wizard, once per day you may use the bonded item to cast any level 3 spell you know, once for any level 2 spell you know, once for every level 1 spell you know, and once for every level 0 spell you know.

Disadvantage: Can not specialize in any school of magic, or gain any benefits of any specialization (including generalist). However, you still must choose two opposition schools. If your bonded item is destroyed, it takes you twice as long as twice as much gold to replace it.


The mnemonic robe is what people are thinking of. It lets you cast from a spellbook or scroll using sorcerer slots and spellcasting ability once a day. It costs 5000 gp.

If you have a generous GM, you might be able to get one with multiple shots per day, at appropriately increased cost.

Silver Crusade

Umbral Reaver wrote:

The mnemonic robe is what people are thinking of. It lets you cast from a spellbook or scroll using sorcerer slots and spellcasting ability once a day. It costs 5000 gp.

If you have a generous GM, you might be able to get one with multiple shots per day, at appropriately increased cost.

Thank you, I knew the Page of Spell Knowledge wasn't it. You could also buy multiples and change clothes throughout the day. Seems like something a high CHA character would do anyway.


very awesome stuff very awesome stuff thanks again to all! This will have to be considered into one of my future games.

Shift gears for a minute, what if:...

Adapt the Warlock from 3.5 complete arcane, then give him a spellbook. I'm thinking require a special feat to use it, maybe a 1.5 multiplier to spellbook costs, and most importantly give him a limited certain number of spells per day from his spellbook based of class levels.

Any thoughts?


Pathfinder Starfinder Society Subscriber

A wizard with a bonded object gains the ability to cast any spell from his spellbook once per day -- that is the closest that a wizard comes to spontaneous casting.

Silver Crusade

David knott 242 wrote:

A wizard with a bonded object gains the ability to cast any spell from his spellbook once per day -- that is the closest that a wizard comes to spontaneous casting.

You are correct, but as this is homebrew forum, any ideas are possible. We could let wizards get all spells added to their spellbook when they reached a high enough level and cast any of them spontaneously. Or at-will wish with no component cost. Or give that ability to fighters. I believe the point is to expand that ability to be useful more than 1/day, or something equivalent/similar.


Pathfinder Starfinder Society Subscriber

In that case, borrowing the spellcasting technique from the spellcasting classes in Arcana Evolved or the spell point system from Unearthed Arcana would be ideas to consider. Or what about the wordcasting system from Ultimate Magic?

Lantern Lodge

Wordcasting is still prepared though for preperation casters.

Spellpoints are my favorite and actually make wizards playable for me.

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