Dreprun stave

In dNetHack, notdNetHack, and notnotdNetHack, the dreprun stave is a ward which scares q quadrupeds, u unicorn or horses, and B bat or birds. Unlike regular wards, staves must be carved with a edged weapon into another weapon, which must be made of wood. A dreprun stave carved weapon must be dropped on the floor at the hero's feet to ward off monsters. The dreprun stave takes 4 turns, and cannot be reinforced further. It gains no secondary effects.

Generation

¹⁄₄₀₀ of all wooden weapons are generated with a dreprun stave carving. Wood weapons engraved with a dreprun stave cannot be wished for.

Troubadours and dwarf heros both start the game with knowledge of the dreprun stave.

Dreprun staves only appear in spellbooks of level 3 and above.

The odds of a spellbook containing a dreprun stave are:

• Level 3 spellbooks: ¹⁄₁₂ (~8.33%) chance.
• Level 4 spellbooks: ⁷⁄₇₂ (~9.72%) chance.
• Level 5 spellbooks: ¹⁄₁₆ (6.25%) chance.
• Level 6 spellbooks: ⁵⁄₇₂ (~6.92) chance.
• Does not appear in level 7 spellbooks.