Bad Form

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Revision as of 18:37, 29 August 2019 by Kernmantle (talk | contribs) (still needs work: recalc percentages, and exactly which forms allow spellcasting?)
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Version 0.17: This article may not be up to date for the latest stable release of Crawl.

Bad forms is the name given to the transformations the player character can suffer when affected by a beam of polymorph, a weapon of chaos or a Transmutations miscast effect. Beams can always be resisted with magic resistance if the player didn't zap himself. Mutation resistance doesn't work, but undead players and those already affected by a bad form are immune. Followers of Zin can be protected by their god.

These are all the transmutations that can happen:

Transmutations usually are cancellable. Transmutations can interfere with spellcasting, depending on the form: eg, you cannot cast in Pig Form; you can in Tree Form.


Most bad forms were added in 0.12. A jelly form was added (eats items, acidic attack but terrible defenses, no item use), but disabled before the branch for testing bad forms was even merged into trunk, let alone a stable release.

Porcupine Form was removed in 0.20.