80 SENTIENT CRYSTALS. This cavern is marked by extensive quartz deposits. Thirteen of the pieces of quartz are actually sentient crystals, quite friendly and fully capable of speech with average intelligence.
13 Sentient Crystals (AC -2; MV 0”; HD 1; hp 8 each; #AT 0; D Nil; XP -)
They can be removed and taken but talk at all the wrong times. Those with a sentient crystal are incapable of surprising other creatures under normal conditions. They should be treated as sages with a special category knowledge of Geology & Mineralogy but no other ability to answer questions outside of this special knowledge category.