diff --git a/server/src/game.rs b/server/src/game.rs
index da903232..c3867855 100644
--- a/server/src/game.rs
+++ b/server/src/game.rs
@@ -653,7 +653,8 @@ pub fn games_need_upkeep(tx: &mut Transaction) -> Result<Vec<Game>, Error> {
     let query = "
         SELECT data, id
         FROM games
-        WHERE finished = false;
+        WHERE finished = false
+        FOR UPDATE;
     ";
     let result = tx
         .query(query, &[])?;
diff --git a/server/src/instance.rs b/server/src/instance.rs
index 5c95f0e7..740efb55 100644
--- a/server/src/instance.rs
+++ b/server/src/instance.rs
@@ -582,7 +582,8 @@ pub fn instances_need_upkeep(tx: &mut Transaction) -> Result<Vec<Instance>, Erro
     let query = "
         SELECT data, id
         FROM instances
-        WHERE id != '00000000-0000-0000-0000-000000000000';
+        WHERE id != '00000000-0000-0000-0000-000000000000'
+        FOR UPDATE;
     ";
 
     let result = tx
diff --git a/server/src/vbox.rs b/server/src/vbox.rs
index 68f7f9f2..bcdde1c1 100644
--- a/server/src/vbox.rs
+++ b/server/src/vbox.rs
@@ -346,14 +346,14 @@ fn get_combos() -> Vec<Combo> {
     let mut combinations = vec![
         Combo { units: vec![Var::Buff, Var::Red,    Var::Red],      var: Var::Empower   },
         Combo { units: vec![Var::Buff, Var::Green,  Var::Green],    var: Var::Triage    },
-        Combo { units: vec![Var::Buff, Var::Blue,   Var::Blue],     var: Var::Amplify },
+        Combo { units: vec![Var::Buff, Var::Blue,   Var::Blue],     var: Var::Amplify   },
         Combo { units: vec![Var::Buff, Var::Red,    Var::Green],    var: Var::Clutch    },
-        Combo { units: vec![Var::Buff, Var::Green,  Var::Blue],     var: Var::Hostility   },
+        Combo { units: vec![Var::Buff, Var::Green,  Var::Blue],     var: Var::Curse },
         Combo { units: vec![Var::Buff, Var::Red,    Var::Blue],     var: Var::Haste     },
 
         Combo { units: vec![Var::Debuff, Var::Red,    Var::Red],    var: Var::Snare     },
         Combo { units: vec![Var::Debuff, Var::Green,  Var::Green],  var: Var::Purge     },
-        Combo { units: vec![Var::Debuff, Var::Blue,   Var::Blue],   var: Var::Curse     },
+        Combo { units: vec![Var::Debuff, Var::Blue,   Var::Blue],   var: Var::Silence   },
         Combo { units: vec![Var::Debuff, Var::Red,    Var::Green],  var: Var::Slow      },
         Combo { units: vec![Var::Debuff, Var::Green,  Var::Blue],   var: Var::Siphon    },
         Combo { units: vec![Var::Debuff, Var::Red,    Var::Blue],   var: Var::Invert    },