You would need to identify what oBoss is (such as by GetObjectByTag()).
my oBoss is just occult (object oBoss) from the script above
I need to use something like this to destroy my boss
object oPointElazul = GetObjectByTag("Point_Object_Elazul");
object oArea = GetArea(oPointElazul);
object oBoss = GetFirstObjectInArea(oArea);
while(GetIsObjectValid(oBoss))
{
if((GetTag(oBoss) == "Batalha_Moric") || (GetTag(oBoss) == "Batalha_Toro") || (GetTag(oBoss) == "Batalha_Gina") || (GetTag(oBoss) == "Batalha_Bauguro") || (GetTag(oBoss) == "Batalha_Kenshin") || (GetTag(oBoss) == "Batalha_Gramish") || (GetTag(oBoss) == "Batalha_Iris") || (GetTag(oBoss) == "Batalha_Boxer") || (GetTag(oBoss) == "Batalha_Tentaclus"))
{
DestroyObject(oBoss);
}
oBoss = GetNextObjectInArea(oArea);
}