▁to ▁serve ▁mag icians . ▁Sand est ins ▁allow ▁m ages ▁to ▁perform ▁certain ▁powerful ▁sp ells ▁without ▁having ▁to ▁memor ize ▁sy ll ables . ▁They ▁are ▁fully ▁aware ▁they ▁are ▁superior ▁to ▁their ▁master s ▁in ▁magic ▁ability , ▁which ▁only ▁adds ▁to ▁the ▁res ent ment ▁they ▁feel . ▁ ▁In flu ence ▁on ▁Dun ge ons ▁and ▁Drag ons ▁▁ ▁The ▁D ying ▁Earth ▁was ▁featured ▁in ▁the ▁Advanced ▁Dun ge ons ▁& ▁Drag ons ▁Advanced ▁Player ' s ▁Guide ▁under ▁Append ix ▁N : ▁Liter ature ▁as ▁one ▁of ▁the ▁works ▁that ▁were ▁read ▁during ▁the ▁development ▁of ▁the ▁game ▁system . ▁The ▁designer , ▁Gary ▁G yg ax , ▁also ▁cred ited ▁the ▁novel ▁with ▁being ▁the ▁insp iration ▁for ▁the ▁magic ▁system , ▁which ▁he ▁called ▁" V anci an ." ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : D ying ▁Earth ▁Category : Short ▁story ▁collections ▁by ▁Jack ▁V ance ▁Category : F ant asy ▁short ▁story ▁collections ▁Category : P ic ares que ▁nov els ▁Category : 1 9 5 0 ▁short ▁story ▁collections ▁Category : 1 9 5 0 ▁science ▁fiction ▁nov els <0x0A> </s> ▁Part s ▁Man ufact urer ▁Appro val ▁( P MA ) ▁is ▁an ▁appro val ▁granted ▁by ▁the ▁United ▁States ▁Federal ▁A viation ▁Administration ▁( FA A ) ▁to ▁a ▁manufact urer ▁of ▁aircraft ▁parts . ▁ ▁Appro val ▁It ▁is ▁generally ▁illegal ▁in ▁the ▁United ▁States ▁to ▁install ▁replacement ▁or ▁modification ▁parts ▁on ▁a ▁certific ated ▁aircraft