//Put this on action taken in the conversation editor
void main()
{
object oPC = GetPCSpeaker();
object oTarget = GetWaypointByTag("wp_celest_chest");
location lTarget = GetLocation(oTarget);

ApplyEffectAtLocation(DURATION_TYPE_INSTANT, EffectVisualEffect(VFX_FNF_STRIKE_HOLY), lTarget);
object oSpawn = CreateObject(OBJECT_TYPE_PLACEABLE, "celestial_void", lTarget);
}