Expanded Arcane Spell Acquisition Rules for Advanced Old-School Essentials
Old-School Essentials (OSE) and 1980s "basic" D&D restrict magic-user spell acquisition to mentoring and research, as described here: https://oldschoolessentials.necroticgnome.com/srd/index.php/Spell_Books Notably, magic-users cannot learn new spells from scrolls or spell books that they obtain, as is the case in AD&D. At my group's OSE table, however, we've adopted the Advanced Rules for this part of the game, and have rejected the common idea that magic-users obtain a new spell upon advancing a level. As such, I've hammered out some rules of thumb for spell acquisition with the player running the magic-user . Returning to the Classic Rules for a moment, we know that researching a new spell costs 1000 gp per spell level (taking 2 weeks per spell level), whereas recreating a lost spell book requires that each spell be rewritten at the cost of 1000 gp per spell level (taking 1 week per spell level). Presumably the costs involve materials for special inks, p...