ambient mutation in inner cabins cellar depths is slower and more obvious

[Tektolnes]

Summary

Balance "ambient mutation in cellar depths is slower and more obvious"

Purpose of change

Being in the cellar depths mutates you. I think it was a bit too quick, and there weren't any messages about what was going on.

Describe the solution

Adds some snippets that appear when mutating.

Mutating is slowed down substantially. Initial chances are now 1/600 each time the check is made, and the chance of increasing/decreasing the odds based on location has been changed to 1/500.

Describe alternatives you've considered

Different numbers. Tried a few. This feels good.

Testing

Lived in the cellar depths for a bit. Mutated. Watched the log.

Additional context

[github-actions]

Spell checker encountered unrecognized words in the in-game text added in this pull request. See below for details.

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• "You move without thinkin. It works."

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