diff --git a/public/game.html b/public/game.html
index 17e36ae..9d5015d 100644
--- a/public/game.html
+++ b/public/game.html
@@ -210,7 +210,7 @@ logs...</pre
             const dest = document.getElementById("effectsFeed");
             if (!dest) return;
             const effects = Object.values(activeEffects).filter(
-              (e) => e && e.type === "brouillard",
+              (e) => e && (e.type === "brouillard" || e.type === "medusa" || e.type === "empathie"),
             );
             if (!effects || !effects.length) {
               dest.textContent = "Aucun effet actif pour l'instant.";
@@ -793,9 +793,13 @@ logs...</pre
                   }
                 }
               } catch (e) {}
-                // track brouillard effects for the sidebar feed
+                // track brouillard / medusa / empathie effects for the sidebar feed
                 try {
-                  if (effect.type === "brouillard") {
+                  if (
+                    effect.type === "brouillard" ||
+                    effect.type === "medusa" ||
+                    effect.type === "empathie"
+                  ) {
                     activeEffects[effect.id] = effect;
                     refreshEffectsFeed();
                   }
@@ -826,10 +830,47 @@ logs...</pre
               const eff = data && (data.effect || data);
               if (!eff || !eff.id) return;
               try {
-                activeEffects[eff.id] = eff;
-              } catch (_) {}
-              try {
-                refreshEffectsFeed();
+                // If the server reports remainingTurns <= 0, treat as expired and remove from feed
+                if (typeof eff.remainingTurns === "number" && eff.remainingTurns <= 0) {
+                  try {
+                    delete activeEffects[eff.id];
+                  } catch (_) {}
+                  try {
+                    // also remove medusa visuals if present
+                    if (eff.type === "medusa") {
+                      const sq =
+                        boardEl &&
+                        boardEl.querySelector &&
+                        boardEl.querySelector(
+                          `.square[data-medusa-effect-id][data-medusa-effect-id="${eff.id}"]`,
+                        );
+                      if (sq) {
+                        sq.classList.remove("petrified");
+                        try {
+                          delete sq.dataset.medusaEffectId;
+                        } catch (_) {}
+                      } else {
+                        const all = boardEl.querySelectorAll(".square.petrified");
+                        all.forEach((s) => {
+                          try {
+                            if (s.dataset && s.dataset.medusaEffectId === String(eff.id)) {
+                              s.classList.remove("petrified");
+                              delete s.dataset.medusaEffectId;
+                            }
+                          } catch (_) {}
+                        });
+                      }
+                    }
+                  } catch (_) {}
+                  try {
+                    refreshEffectsFeed();
+                  } catch (_) {}
+                } else {
+                  activeEffects[eff.id] = eff;
+                  try {
+                    refreshEffectsFeed();
+                  } catch (_) {}
+                }
               } catch (_) {}
             } catch (e) {
               console.warn("card:effect:updated handler error", e);
@@ -877,9 +918,13 @@ logs...</pre
                   }
                 } catch (_) {}
               }
-              // brouillard removal from sidebar feed
+              // remove any feed entry for effects that are removed
               try {
-                if (type === "brouillard") {
+                if (
+                  type === "brouillard" ||
+                  type === "medusa" ||
+                  type === "empathie"
+                ) {
                   try {
                     delete activeEffects[effId];
                   } catch (_) {}
diff --git a/server.js b/server.js
index 134d31a..05ff743 100644
--- a/server.js
+++ b/server.js
@@ -5,6 +5,7 @@ const { v4: uuidv4 } = require("uuid");
 
 const app = express();
 const path = require("path");
+const { title } = require("process");
 const server = http.createServer(app);
 const io = new Server(server, { cors: { origin: "*" } });
 
@@ -35,9 +36,54 @@ app.get("/cards", (req, res) => {
 // room = { id, boardState: object|null, players: [{id, socketId, color}], status, size }
 const rooms = new Map();
 
+// Remove any active effects whose remainingTurns <= 0 and notify clients.
+function purgeExpiredEffects(room) {
+  try {
+    if (!room || !Array.isArray(room.activeCardEffects)) return;
+    for (let i = room.activeCardEffects.length - 1; i >= 0; i--) {
+      const e = room.activeCardEffects[i];
+      if (!e) continue;
+      if (typeof e.remainingTurns === "number" && e.remainingTurns <= 0) {
+        try {
+          // handle special expiry side-effects (empathie etc.) if needed
+          if (e && e.type === "empathie") {
+            try {
+              (room.players || []).forEach((pl) => {
+                if (!pl || !pl.color) return;
+                if (pl.color === "white") pl.color = "black";
+                else if (pl.color === "black") pl.color = "white";
+              });
+              try {
+                if (room.boardState)
+                  room.boardState.version = (room.boardState.version || 0) + 1;
+              } catch (_) {}
+            } catch (_) {}
+          }
+        } catch (_) {}
+        try {
+          room.activeCardEffects.splice(i, 1);
+        } catch (_) {}
+        try {
+          io.to(room.id).emit("card:effect:removed", {
+            roomId: room.id,
+            effectId: e.id,
+            type: e.type,
+            playerId: e.playerId,
+          });
+        } catch (_) {}
+      }
+    }
+  } catch (err) {
+    console.error("purgeExpiredEffects error", err);
+  }
+}
+
 // Send a room:update payload to each player individually so hands remain private.
 function sendRoomUpdate(room) {
   if (!room) return;
+  try {
+    purgeExpiredEffects(room);
+  } catch (_) {}
   const base = {
     boardState: room.boardState || null,
     players: (room.players || []).map((p) => ({ id: p.id, color: p.color })),
@@ -3193,12 +3239,13 @@ io.on("connection", (socket) => {
           room.activeCardEffects = room.activeCardEffects || [];
           const effect = {
             id: played.id,
+            title: "Médusa",
             type: "medusa",
             playerId: senderId,
             pieceId: targetPiece.id,
             pieceSquare: targetPiece.square,
             remainingTurns: 4,
-            decrementOn: "owner",
+            decrementOn: "both",
             imposedBy: senderId,
             ts: Date.now(),
           };
@@ -3212,7 +3259,8 @@ io.on("connection", (socket) => {
               pieceId: targetPiece.id,
               pieceSquare: targetPiece.square,
               remainingTurns: 1,
-              decrementOn: "owner",
+              // remove the visual marker after any player's action
+              decrementOn: "both",
               imposedBy: senderId,
               ts: Date.now(),
             };
@@ -3667,6 +3715,7 @@ io.on("connection", (socket) => {
 
           const effect = {
             id: played.id,
+            title: "Empathie",
             type: "empathie",
             playerId: senderId,
             // lasts 6 turns (decrement on every end-of-turn)