Spell field defined that determines if must be sneaking to use this ability.

This is handled by client under normal conditions, however if you
force cast this effect in situations like 'procs' you can cause
zone crashes, therefore a failsafe check is added in 'SpellOnTarget'

common/shareddb.cpp

@@ -1564,6 +1564,7 @@ void SharedDatabase::LoadSpells(void *data, int max_spells) {
 		sp[tempid].NimbusEffect = atoi(row[193]);
 		sp[tempid].directional_start = static_cast<float>(atoi(row[194]));
 		sp[tempid].directional_end = static_cast<float>(atoi(row[195]));
+		sp[tempid].sneak = atoi(row[196]) != 0;
 		sp[tempid].not_extendable = atoi(row[197]) != 0;
 		sp[tempid].suspendable = atoi(row[200]) != 0;
 		sp[tempid].viral_range = atoi(row[201]);

common/spdat.h

@@ -722,7 +722,7 @@ struct SPDat_Spell_Struct
 /* 193 */	int NimbusEffect;
 /* 194 */	float directional_start; //Cone Start Angle:
 /* 195 */	float directional_end; // Cone End Angle:
-/* 196 */
+/* 196 */   bool sneak; // effect can only be used if sneaking (rogue 'Daggerfall' ect)
 /* 197 */	bool not_extendable;
 /* 198- 199 */
 /* 200 */	bool suspendable; // buff is suspended in suspended buff zones