diff --git a/rogueviz/ru/classes.cpp b/rogueviz/ru/classes.cpp
index 887ec61e..452867a6 100644
--- a/rogueviz/ru/classes.cpp
+++ b/rogueviz/ru/classes.cpp
@@ -577,6 +577,19 @@ struct located_entity : public entity {
   xy default_where() override { return respawn; }
   };
 
+struct rollingsaw: public located_entity {
+  string glyph() override { return "*"; }
+  color_t color() override { return walls[wWall].color; }
+  xy siz() override { return {8, 8}; }
+  string get_name() override { return "rolling saw"; }
+  void act() override;
+  int dir, respawn_dir;
+  xy default_vel() override {
+    auto dat = get_dat(); return {dat.d * dat.modv * dir, 0};
+    }
+  virtual void hs(stater& s) override { s.act("dir", dir, respawn_dir); located_entity::hs(s); }
+  };
+
 struct timed_orb : public located_entity {
   int duration;
   xy siz() override { return {18, 18}; }
diff --git a/rogueviz/ru/entity.cpp b/rogueviz/ru/entity.cpp
index 8cd1aa09..90a0be05 100644
--- a/rogueviz/ru/entity.cpp
+++ b/rogueviz/ru/entity.cpp
@@ -1075,4 +1075,20 @@ void guard_event::act() {
     }
   }
 
+void rollingsaw::act() {
+  stay_on_screen();
+  kino();
+  if(on_floor) {
+    auto dat = get_dat();
+    if(abs(vel.x) < 1e-6) {
+      dir = -dir;
+      }
+    vel.x = zero_vel.x + dat.d * dat.modv * dir;
+    }
+  if(intersect(get_pixel_bbox(), m.get_pixel_bbox()) && gframeid > invinc_end) {
+    if(m.reduce_hp(60)) addMessage("The " + hal()->get_name() + " shreds you!");
+    }
+  }
+
+
 }
diff --git a/rogueviz/ru/load-world.cpp b/rogueviz/ru/load-world.cpp
index 9b994e50..a8ea607f 100644
--- a/rogueviz/ru/load-world.cpp
+++ b/rogueviz/ru/load-world.cpp
@@ -377,6 +377,12 @@ void load_room(fhstream& f, cell *c) {
         b->base = std::move(r.entities.back());
         r.entities.back() = std::move(b);
         }
+      else if(cap == "ROLLINGSAW") {
+        auto b = std::make_unique<rollingsaw>(); nam(*b);
+        b->respawn = get_xy();
+        b->respawn_dir = get_int();
+        r.entities.emplace_back(std::move(b));
+        }
       else if(cap == "HINT") {
         auto b = std::make_unique<hint>();
         b->respawn = get_xy(); b->size = get_xy();