Spellbook of knock

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spellbook of
+   knock   Light green spellbook.png
Appearance random
Abundance 3.56%
Base price 100 zm
Weight 50
Turns to read 1
Ink to write 5–9
Spell type matter
Level 1
Power cost 5 Pw
Direction beam
Equivalent wand of opening

Reading a Spellbook of knock allows the player to cast the knock spell. This will unlock doors and containers, as well as revealing hidden doors. The effect is an exact duplicate of that of the wand of opening.[1] Since a lock pick or skeleton key has a similar effect but doesn't cost power, this spell is almost useless, and is usually thrown away, polypiled, or overwritten. However, it can be used to practice matter spells in preparation for casting more powerful such spells later (notably polymorph); to open the Castle drawbridge; to expose secret doors whose locations are known to the player but not the character; or to unlock doors slightly faster than a key would manage (this is mostly only useful on the Astral Plane, though, and a marginal benefit even there). Knock will also cause engulfing monsters to expel you, making it useful on the Plane of Air.

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