And increase the rarity again.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4521 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on April 23, 2008
N33RMBVBJJPQGTDDSSMU34KBWTKWM6IR6YU7HFVVBHWT72X7G7NAC
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