diff --git a/rogueviz/ru/classes.cpp b/rogueviz/ru/classes.cpp
index b2fbba52..8e5997fb 100644
--- a/rogueviz/ru/classes.cpp
+++ b/rogueviz/ru/classes.cpp
@@ -26,7 +26,7 @@ struct randeff {
   randeff (string name, string desc, string effect, powerfun act) : name(name), desc(desc), effect(effect), act(act) {}
   };
 
-enum class mod { burning, freezing };
+enum class mod { burning, freezing, disarming };
 
 struct power {
   int key;
@@ -214,6 +214,8 @@ struct entity {
   virtual struct trader* as_trader() { return nullptr; }
   virtual struct missile* as_missile() { return nullptr; }
 
+  virtual bool is_disarmer() override { return false; }
+
   int hp;
   int invinc_end;
 
@@ -310,7 +312,7 @@ struct entity {
 struct statdata {
   statarray<ld> stats;
   int jump_control, coyote_time, hallucinating;
-  ld detect_area, detect_cross;
+  ld detect_area, detect_cross, rough_detect;
   void reset();
   vector<tuple<power*, mod, int>> mods;
   };
diff --git a/rogueviz/ru/man.cpp b/rogueviz/ru/man.cpp
index a58a7450..afdf8054 100644
--- a/rogueviz/ru/man.cpp
+++ b/rogueviz/ru/man.cpp
@@ -43,6 +43,7 @@ void statdata::reset() {
   jump_control = 0;
   detect_area = 0;
   detect_cross = 0;
+  rough_detect = 0;
   hallucinating = false;
   mods.clear();
   }
@@ -139,6 +140,10 @@ void man::launch_attack(power *p, int fac, boxfun f) {
       for(auto& [m, qty]: p->mods) {
         if(m == mod::burning) { e->invinc_end = sav; e->attacked(qty); }
         if(m == mod::freezing) { e->invinc_end = sav; e->attacked(qty); }
+        if(m == mod::disarming && e->hidden()) {
+          e->existing = false;
+          addMessage("You have disarmed a "+e->get_name()+".");
+          }
         }
       }
   for(int y=bb.miny; y<bb.maxy; y++)
@@ -157,6 +162,10 @@ void man::launch_attack(power *p, int fac, boxfun f) {
         current_room->replace_block_frev(x, y, wFrozen);
         addMessage("You freeze the water!");
         }
+      if(m == mod::disarming && b == wRogueWallHidden) {
+        current_room->replace_block_frev(x, y, wRogueWall);
+        addMessage("You open a secret passage!");
+        }
       }
     }
   }
diff --git a/rogueviz/ru/powers.cpp b/rogueviz/ru/powers.cpp
index a1b9bb99..55aa7a77 100644
--- a/rogueviz/ru/powers.cpp
+++ b/rogueviz/ru/powers.cpp
@@ -31,12 +31,14 @@ power& power::be_weapon() {
     for(auto& [m, qty]: mods) {
       if(m == mod::burning) s = "flaming " + s;
       if(m == mod::freezing) s = "freezing " + s;
+      if(m == mod::disarming) s = "disarming " + s;
       }
     return s;
     };
   auto gc = get_color; get_color = [gc, this] {
     auto col = gc();
     for(auto& [m, qty]: mods) {
+      if(m == mod::disarming) col = 0x4040C0FF;
       if(m == mod::burning) col = gradient(0xFFFF00FF, 0xFF0000FF, -1, sin(ticks/100), 1);
       if(m == mod::freezing) col = 0x8080FFFF;
       }
diff --git a/rogueviz/ru/randeff.cpp b/rogueviz/ru/randeff.cpp
index 41d001cb..1e325349 100644
--- a/rogueviz/ru/randeff.cpp
+++ b/rogueviz/ru/randeff.cpp
@@ -50,7 +50,12 @@ randeff trap_detect_cross("Detect cross", "Lets you see traps and secret passage
   });
 
 randeff trap_snake("Snake Hair", "Lets you create snakes that can be used to disarm traps and secret passages.", "You grow snakes on your head!", [] (data &d) { });
-randeff trap_disarm("Disarm traps", "Lets you see all traps on the level for a short time, and to attack them with your [weapon] to destroy them.", "You suddenly feel able to disarm traps with your [weapon]!", [] (data &d) { });
+
+randeff trap_disarm("Disarm traps", "Lets you see all traps on the level for a short time, and to attack them with your [weapon] to destroy them.", "You suddenly feel able to disarm traps with your [weapon]!", [] (data &d) { 
+  m.next.rough_detect = 0.1;
+  if(d.mode == rev::active)
+    m.next.mods.emplace_back(d.re->which_weapon, mod::disarming, m.current.stats[stat::wis]);
+  });
 
 // health powers
 randeff health_heal("Healing", "Instantly heals you.", "You feel healthier!", [] (data &d) {
diff --git a/rogueviz/ru/render.cpp b/rogueviz/ru/render.cpp
index 89925c26..78deaa6a 100644
--- a/rogueviz/ru/render.cpp
+++ b/rogueviz/ru/render.cpp
@@ -287,6 +287,33 @@ void man::draw() {
       });
     }
 
+  if(m.current.rough_detect > 0) {
+    ld r = inverse_wvolarea_auto(m.current.rough_detect);
+
+    auto h0 = to_hyper(m.where);
+
+    bool found = false;
+    for(auto& e: current_room->entities) if(e->existing && e->hidden() && hdist(h0, to_hyper(e->where)) < r) found = true;
+
+    if(!found) current_room->bfs(xy_to_block(m.where), [&] (intxy xy) {
+      if(hdist(h0, block_to_hyper(xy)) > r) return false;
+      auto what = current_room->at(xy);
+      if(what == wRogueWallHidden) { found = true; return false; }
+      return true;
+      });
+
+    if(found) {
+      auto T = eupush(h0);
+      for(int a=0; a<=360; a++) {
+        auto h = from_hyper(T * xspinpush0(a*1._deg, r));
+        curvepoint(eupush(h.x, h.y) * C0);
+        }
+      vid.linewidth *= 3;
+      queuecurve(scrm, 0xFF000080, 0, PPR::LINE);
+      vid.linewidth /= 3;
+      }
+    }
+
   if(m.current.detect_cross > 0) for(int d: {0, 1, 2, 3}) {
     transmatrix T = eupush(to_hyper(m.where)) * spin(90._deg * d);
     ld dist = 0;