Draft:Scroll of spells: Difference between revisions
OmegaAdmin (talk | contribs) 为已保存草稿补齐章节目录、条件表格与可见源码 References，保留 Draft 状态 |
OmegaAdmin (talk | contribs) 建立法术总览与施法机制，补齐八种侦察探索法术并连接获取和物品入口 |
||
| (One intermediate revision by the same user not shown) | |||
| Line 1: | Line 1: | ||
{{Version box|version=0.90.4}} | {{Version box|version=0.90.4}} | ||
{{Consumable infobox|name=Scroll of spells|kind=Scroll|glyph=?|color=yellow|value=250|level=1|weight=5|appearance=Random inscription|cursed=Scroll of spell loss}} | {{Consumable infobox|name=Scroll of spells|kind=Scroll|glyph=?|color=yellow|value=250|level=1|weight=5|appearance=Random inscription|cursed=Scroll of spell loss}} | ||
A '''scroll of spells''' offers a chance to learn a random spell, or reduce the mana cost of a spell already known. It is a portable research opportunity, not a scroll that casts a preselected spell.<ref name="iinit-h-92">{{Source|iinit.h|92}}.</ref> | A '''scroll of spells''' offers a chance to learn a random [[Draft:Spells|spell]], or reduce the mana cost of a spell already known. It is a portable [[Draft:Spellcasting#Research difficulty|research opportunity]], not a scroll that casts a preselected spell.<ref name="iinit-h-92">{{Source|iinit.h|92}}.</ref> | ||
__TOC__ | __TOC__ | ||
| Line 9: | Line 9: | ||
== Description == | == Description == | ||
Eating the remains of a [[Draft:Manaburst|manaburst]] invokes the same random research attempt as an ordinary noncursed scroll. Those remains require a normal kill and a successful corpse-drop roll; its contact explosion does not make that roll.<ref>{{Source|item.c|113|115}}; {{Source|itemf1.c|120|128}}; {{Source|mspec.c|559|584}}; {{Source|mon.c|134|203}}.</ref> | |||
An uncursed or blessed reading selects a random spell at use time. Let ''D'' be that spell's current mana cost and let ''T'' = 4 × Intelligence + 8 × experience level. Research succeeds when a uniformly chosen integer from ''D'' through 5''D'' − 1 is less than ''T''. Thus it always fails at ''T'' ≤ ''D'', always succeeds at ''T'' ≥ 5''D'', and otherwise succeeds with probability (''T'' − ''D'') / (4''D''). | An uncursed or blessed reading selects a random spell at use time. Let ''D'' be that spell's current mana cost and let ''T'' = 4 × Intelligence + 8 × experience level. Research succeeds when a uniformly chosen integer from ''D'' through 5''D'' − 1 is less than ''T''. Thus it always fails at ''T'' ≤ ''D'', always succeeds at ''T'' ≥ 5''D'', and otherwise succeeds with probability (''T'' − ''D'') / (4''D''). | ||
Latest revision as of 11:41, 21 September 2026
| ? | |
| Type | Scroll |
|---|---|
| Base value (Au) | 250 |
| Item level | 1 |
| Weight | 5 |
| Unidentified appearance | Random inscription |
| Cursed name | Scroll of spell loss |
A scroll of spells offers a chance to learn a random spell, or reduce the mana cost of a spell already known. It is a portable research opportunity, not a scroll that casts a preselected spell.[1]
Generation
In addition to the item-level-1 random-scroll pool, pawn-shop stock and acquirement, necromancers start with a scroll of spells. Their other loot is separate from this specified starting item.[2][3][4][5]
Description
Eating the remains of a manaburst invokes the same random research attempt as an ordinary noncursed scroll. Those remains require a normal kill and a successful corpse-drop roll; its contact explosion does not make that roll.[6]
An uncursed or blessed reading selects a random spell at use time. Let D be that spell's current mana cost and let T = 4 × Intelligence + 8 × experience level. Research succeeds when a uniformly chosen integer from D through 5D − 1 is less than T. Thus it always fails at T ≤ D, always succeeds at T ≥ 5D, and otherwise succeeds with probability (T − D) / (4D).
Success teaches an unknown spell and grants 10D experience. If it is already known, its mana cost becomes half the old cost, rounded up. Failure still consumes the scroll. Blessing does not improve the research check, and the scroll's enchantment does not choose the spell or increase the chance.
A cursed reading forgets the known spell encountered first while scanning the spell list backward. It is not a random spell loss. The scroll type becomes known after a noncursed reading, and also after a cursed reading that actually finds a known spell to remove.[7][8]
Strategy
Use these to broaden a repertoire or make repeated casting cheaper. Higher Intelligence and experience level improve difficult research, so keeping a scroll until after a nearby level gain or Intelligence improvement can be sensible. The selected spell is still random: delaying cannot guarantee the particular spell you need.
Once a spell is already cheap, another successful reduction can have little or no benefit. Compare the uncertain portable attempt with research at the Collegium Magii or the Circle of Sorcerors, according to your membership and the service available. Spend a blessing to remove a known curse if necessary, not to seek a nonexistent blessed research bonus.
References
- ↑ iinit.h in Omega 0.90.4, line 92.
- ↑ item.c in Omega 0.90.4, line 7 (
create_object). - ↑ site1.c in Omega 0.90.4, line 1022 (
l_pawn_shop). - ↑ effect1.c in Omega 0.90.4, line 647 (
acquire). - ↑ item.c in Omega 0.90.4, line 167 (
make_scroll). - ↑ item.c in Omega 0.90.4, lines 113–115; itemf1.c in Omega 0.90.4, lines 120–128; mspec.c in Omega 0.90.4, lines 559–584; mon.c in Omega 0.90.4, lines 134–203.
- ↑ itemf1.c in Omega 0.90.4, line 120 (
i_spells). - ↑ effect3.c in Omega 0.90.4, line 271 (
learnspell).