diff --git a/server/gameserver/incubator.cc b/server/gameserver/incubator.cc
index 63c6c284..40110a47 100644
--- a/server/gameserver/incubator.cc
+++ b/server/gameserver/incubator.cc
@@ -712,6 +712,12 @@ void Incubator::StartNewBattleMode()
                              break;
                          }
                      }
+                     if (!killer && !invisable_teammates.empty()) {
+                         std::shuffle(invisable_teammates.begin(),
+                                      invisable_teammates.end(),
+                                      std::default_random_engine(a8::XGetTickCount()));
+                         killer = invisable_teammates.at(0);
+                     }
                  }
              }
          },