void ExplodeAtLocation(location lTarget, int nDamage, int nSaveDC = 15, float fRadius = 5.) {
ApplyEffectAtLocation(DURATION_TYPE_INSTANT, EffectVisualEffect(VFX_FNF_FIREBALL), lTarget);
ApplyEffectAtLocation(DURATION_TYPE_INSTANT, EffectVisualEffect(VFX_FNF_SUMMON_UNDEAD), lTarget);

object oObject = GetFirstObjectInShape(SHAPE_SPHERE, fRadius, lTarget);
do {
int nDamageAfterSave = GetReflexAdjustedDamage(nDamage, oObject, nSaveDC);
ApplyEffectToObject(DURATION_TYPE_INSTANT, EffectDamage(nDamageAfterSave, DAMAGE_TYPE_FIRE), oObject);
} while ((oObject = GetNextObjectInShape(SHAPE_SPHERE, fRadius, lTarget)) != OBJECT_INVALID); }

void main()
{
location lSource = GetLocation(GetObjectByTag("HolyAltar"));
DelayCommand(0.5, ExplodeAtLocation(lSource, d12(12)));
}