Questions - Diaspora IV

[MaH - Meganno al Hamam]

Before you invent such a houserule you should ask yourself how the Lvl1 wizard at start learns a spell if he has no spellbook at all and what will happen, if a wizard will loose his spellbooks and start anew. Instead of inventing again a complex process you just can use the learning check, preparation time and copying rules.

[YK - Yuri Khavlor]

But my case is: the wizard learn the spell in preparing it from another spellbound and making a Int % check. If he learns it he can cast it which erases the spell from his mind. Or he can write the spell down which will cost a lot and takes 1/2 days per lvl.

You can learn a spell from another spell book (except in this game).

Learning a spell does NOT put it in your mind, that is the fluff describing the memorization process and using your slots.

You cannot cast a spell not memorized. (excepting magic item use of course)
You cannot memorize a spell if you don't have a spell slot
You cannot put a spell in a spell slot if you don't have it in your spell book (and access to your spell book)
You cannot add a spell to your spellbood you do not understand

[TH - The Hunt]

When a wizard learns a spell, they know it permanently. Oddly enough, this suggests that if a wizard loses their spellbook, they can recreate it (at least, functionally) from memory, with enough time and resources, without any need for access to other written materials or outside sources of information.

[YK - Yuri Khavlor]

Before you invent such a houserule you should ask yourself how the Lvl1 wizard at start learns a spell if he has no spellbook at all and what will happen, if a wizard will loose his spellbooks and start anew. Instead of inventing again a complex process you just can use the learning check, preparation time and copying rules.

A level 1 wizard, knows a bunch of spells upon becoming a wizard.

If he has no spellbook, he recreates it. If he is in the middle of an adventure, he is screwed. (similar to priest a losing a holy symbol)

How is the current process more complex, then having to roll a % for every spell know?

[TH - The Hunt]

Wizard realm spells work the same way, except that instead of filling pages in a spellbook, each one fills an entire set of books. (They take a whole month to prepare and cast, so there must be a lot of notes to read through.)

[MaH - Meganno al Hamam]

A misunderstanding- Iam not speaking about the simplified process from BR Game but about the process from phb.

If a wizard can simply recreate his spellbook, that would mean he has information about all his spells inside where? Normally the information is erased with casting the spell and he has to prepare again to know all the detailed information and casting it again.
So if he has still spells in his mind, he perhaps can recreatew them but what about the spells he has not prepared? He need his spellbook to rememorize them and that is gone? What I mean is, it is easier to assume, that if he has a spell prepared he can write it down, if not he has to seek it from somewhere else again.
Or where do you read the information in PHB or DMG that a wizard can recreate his spellbook if he has lost it from nothing- it is stated that he is vulnerable and depends on them.

[MaH - Meganno al Hamam]

wizard realm spells are normally a complete other thing then normal spells (BR original rules)- they are more like a ritual and have the worth of powerfull magic items instead of that of a simple magic missile. Thats the reason you can´t copy them easily etc.

[YK - Yuri Khavlor]

[+] dmg on spellbooks

All Sizes and Shapes
There is no standard size or shape for a spell book. A player character can't walk into a wizard's lab or study and instantly spot the spell book because it is the biggest, longest, fattest, squarest, roundest, or thinnest book there. Neither can he measure all the books to find the one that conforms to the dimensions of a spell book. The spell book's size and shape is determined largely by the culture of the wizard who owns it.
Consider, for example, the book you are reading right now. How would one of these pages have appeared in other times and places? In medieval Europe, this page would most likely have been 10 or more hand-lettered sheets of parchment, perhaps embellished with illuminations and painted scenes. In ancient China, this page would have been several hand-printed pages on colored paper and bound with red lacings. The Egyptians would have used a rolled scroll of papyrus, with several required to make a book. Even more cumbersome, the ancient Babylonians would have used clay tables marked in cuneiform and dried. American Indians would have written it on leaves of birch bark or painted it on a cured buffalo hide.
Writing and written works have changed greatly through the centuries of Earth history. A fantasy game world is no different. Spell books should come in a variety of shapes and forms--whatever seems best for the campaign.
A spell book may be a heavy tome, bound in leather with crisp parchment pages. It may be a collection of papyrus scrolls tied with red silk strings. It might be a pile of clay tables marked in cuneiform, or a cheap-looking folio printed on linen rag paper. It even could be thin sheets of embossed gold between covers made from the hide of a naga.
If you don't want to create a unique spell book for your campaign world, here's one standard you can fall back on: Compare them to bulky coffee-table books of today or large, hefty dictionaries. Even if you do create unique spell books, this standard should give you some idea of the appropriate size and bulk.
Often a wizard's complete set of spell books occupies several shelves of his library, especially when the character reaches the highest levels. At this point, it is no longer practical for the character to carry all of his spell books with him when he travels. Therefore, many wizards opt to make traveling spell books.
The traveling spell book is a more selective, more portable version of the character's complete spell books (although there is little that can be done to make clay tablets portable). In the traveling spell book, the wizard places only those spells he believes he will need while traveling.
There is no limitation on which spells can be included, but a traveling spell book has a limited number of pages. Thus, a high-level wizard may need several traveling spell books to contain all the spells he thinks are necessary.

A wizard has a list of spells known. These are the spells they may add to their spell book, it takes time and resources to do so. They can have multiple spell books. especially if you have a game that enforces the size and weight of spellbook.

A wizard has spell slots: These are spells that have been prepared from a spellbook and can be cast that day. You want to cast Fireball twice? you need to memorize it twice.

[TF - The Fortress]

Nor can you copy regular spells easily. The DMG, Complete Wizards, and Spells and Magic all indicate it takes time (typically two weeks per spell level in an uninterrupted environment).

Juan allows for 1 to 2 days per spell level, again in an interview environment.

You're adventuring, you didn't bring your lab, library, and research materials.

He was clear and succint. It is in line with all previous rulings on spell acquisition. So let's drop it and move on.

[MaH - Meganno al Hamam]

From phb: Whenever a wizard discovers instructions for a spell he doesn't know, he can try to read and understand the instructions. The player must roll percentile dice.

You don´t have the spell completely in mind instead you understand it- if you understand a poem you can´t recite it perfectly and exactly this is needed to cast a spell or put the documentation in a spell book so that you can prepare a spell and later cast a spell.

So you have to understand the spell from another spelbook but need the spellbook so you can prepare it and put it exactly to mind with all details and words. You can copy from other spellbooks but never can just recreate a spellbook from thin air because you lost most of the detailed knowledge inside. Except the DM rules otherwise of course.