diff --git a/tyrant.h b/tyrant.h
index c3c37d81..06f4218b 100644
--- a/tyrant.h
+++ b/tyrant.h
@@ -259,6 +259,20 @@ inline PassiveBGE::PassiveBGE passive_bge_name_to_id(const std::string& name_)
     return PassiveBGE::no_bge;
 }
 
+inline Faction faction_name_to_id(const std::string& name_)
+{
+    std::string name(name_);
+    name.erase(std::remove_if(name.begin(), name.end(), boost::is_any_of("-")), name.end()); //Mostly useless
+    for (unsigned i(allfactions); i < num_factions; ++i)
+    {
+        if (boost::iequals(faction_names[i], name))
+        {
+            return static_cast<Faction>(i);
+        }
+    }
+    return allfactions;
+}
+
 inline void map_keys_to_set(const std::unordered_map<unsigned, unsigned>& m, std::unordered_set<unsigned>& s)
 {
     for (auto it = m.begin(); it != m.end(); ++it)
diff --git a/tyrant_optimize.cpp b/tyrant_optimize.cpp
index 6212bb56..910648a5 100644
--- a/tyrant_optimize.cpp
+++ b/tyrant_optimize.cpp
@@ -56,6 +56,7 @@ namespace {
     std::unordered_map<unsigned, unsigned> owned_cards;
     const Card* owned_alpha_dominion{nullptr};
     bool use_owned_cards{true};
+	Faction faction = allfactions;
     unsigned min_deck_len{1};
     unsigned max_deck_len{10};
     unsigned freezed_cards{0};
@@ -1293,6 +1294,11 @@ void hill_climbing(unsigned num_min_iterations, unsigned num_iterations, Deck* d
         {
 			continue;
         }
+		//mono
+		if(faction != allfactions && card->m_faction != faction)
+		{
+			continue;
+		}
 
         // enqueue candidate according to category & type
         if (card->m_type == CardType::commander)
@@ -2056,6 +2062,11 @@ int main(int argc, char** argv)
         {
             opt_keep_commander = true;
         }
+		else if (strcmp(argv[argIndex], "mono") == 0 || strcmp(argv[argIndex], "-m") == 0)
+        {
+			faction = faction_name_to_id(argv[argIndex + 1]);
+			argIndex += 1;
+		}
         else if (strcmp(argv[argIndex], "effect") == 0 || strcmp(argv[argIndex], "-e") == 0)
         {
             opt_effects[2].push_back(argv[argIndex + 1]);