| 4 people marked this as FAQ candidate. |
This question has been marked for FAQ about a dozen times and seems like a pretty glaring omission in the item's original description:
Can the spell that a Ring of Spell Knowledge 'learns' ever be changed?
Ring of Spell Knowledge
Price Varies; Aura moderate or strong (no school); CL 7th; Weight —
Type I 1,500 gp; Type II 6,000 gp; Type III 13,500; Type IV 24,000 gp
This ring comes in four types: ring of spell knowledge I, ring of spell knowledge II, ring of spell knowledge III, and ring of spell knowledge IV. All of them are useful only to spontaneous arcane spellcasters. Through study, the wearer can gain the knowledge of a single spell in addition to those allotted by her class and level. A ring of spell knowledge I can hold 1st-level spells only, a ring of spell knowledge II 1st- or 2nd-level spells, a ring of spell knowledge III spells of 3rd level or lower, and a ring of spell knowledge IV up to 4th-level spells.
A ring of spell knowledge is only a storage space; the wearer must still encounter a written, active, or cast version of the spell and succeed at a DC 20 Spellcraft check to teach the spell to the ring. Thereafter, the arcane spellcaster may cast the spell as though she knew the spell and it appeared on her class' spell list.
Arcane spells that do not appear on the wearer's class list are treated as one level higher for all purposes (storage and casting).
The text of the item neither specifically prohibits or specifically allows the rewriting of the spell held in the ring.
The terms "storage space" seems to indicate something reusable, but is obviously inconclusive. At first read it seemed that it was rewritable, otherwise why go through the trouble of having it absorb spells, and make it just like the Page of Knowledge, which contains a specific spell? Indeed, the Page of Knowledge makes this item somewhat redundant.
Since it costs more than a Page of Spell Knowledge and uses up an item slot, it should be something that allows you to change the spell. Sort of a mnemonic vestment that takes longer to set the spell on.
If it doesn't allow you to discharge and place a new spell in it, I would like to know why anyone would ever use it.