-extern int acid_dam(int dam, cptr kb_str, int monspell);
-extern int elec_dam(int dam, cptr kb_str, int monspell);
-extern int fire_dam(int dam, cptr kb_str, int monspell);
-extern int cold_dam(int dam, cptr kb_str, int monspell);
+extern int acid_dam(int dam, cptr kb_str, int monspell, bool aura);
+extern int elec_dam(int dam, cptr kb_str, int monspell, bool aura);
+extern int fire_dam(int dam, cptr kb_str, int monspell, bool aura);
+extern int cold_dam(int dam, cptr kb_str, int monspell, bool aura);