Divination spells

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Divination spells reveal the nature of items, the dungeon around you, and the unknown.

The following roles can gain skills in the divination school:

Divination spells
Max Role
Basic
Skilled
Expert
Role Skill
Archeologist Expert
Monk Basic
Priest Expert
Rogue Skilled
Ranger Expert
Samurai Basic
Tourist Basic
Wizard Expert

The following spellbooks teach you divination spells:

Spellbook Spell level Direction Relative probability Probability conditional on price Actions to read Skill changes Change description
Spellbook of detect monsters 1 non-directional 4.3% 15.9% 3 S lasts multiple turns
Spellbook of light 1 non-directional 4.5% 16.7% 3
Spellbook of detect food 2 non-directional 3.0% 13.3% 5 S grants food appraisal
Spellbook of clairvoyance 3 non-directional 1.5% 6.2% 8 S displays monsters and item appearances
Spellbook of detect unseen 3 non-directional 2.0% 8.3% 10
Spellbook of identify 3 non-directional 2.0% 8.3% 14 S higher chance of identifying more items
Spellbook of detect treasure 4 non-directional 2.0% 17.4% 17 S more detailed object info
Spellbook of magic mapping 5 non-directional 1.8% 26.5% 37


Strategy

Spell failure rate and more powerful effects are the two main reasons to spend skill slots on divination.

Detect monsters, detect treasure, identify, and (to a lesser degree) detect food all become much more useful at skilled level. Good spellcasting classes will want to advance to skilled unless skill slots are at a premium. Expert and skilled levels have the same effects for all spells in this school, so there is usually no benefit to becoming expert.

If you have these spells, you will likely be casting them a lot. Therefore, basic skill is definitely worthwhile for the spell failure rates. Lesser spellcasters such as rangers and archeologists may sometimes want to become expert (or get a robe) to cast magic mapping, but as divination spells are rarely critical, even they are probably better off just sticking to skilled.

SLASH'EM

In SLASH'EM, the infinitely useful identify spell is increased in difficulty from level 3 to level 5. That makes it more compelling to advancing this skill to expert. Flame Mages can gain expert, Ice Mages can gain basic.