diff --git a/resource/rock.entity.json b/resource/rock.entity.json
new file mode 100644
index 0000000..9a20387
--- /dev/null
+++ b/resource/rock.entity.json
@@ -0,0 +1 @@
+{"traits":{"collider":{"params":{"isSensor":true}},"damaging":{"params":{"damageSpecs":[{"affinity":0,"lock":0.25,"power":50,"variance":0.1}]}},"directional":{"params":{"directionCount":4}},"existent":{"state":{"name":"Rock"}},"item":{"params":{"itemActions":{"type":"actions","traversals":[{"type":"traversal","steps":[{"type":"key","key":"item"},{"type":"key","key":"setDoesNotDamage"},{"type":"invoke","args":[{"type":"traversal","steps":[{"type":"key","key":"user"}]}]}]},{"type":"traversal","steps":[{"type":"key","key":"user"},{"type":"key","key":"list"},{"type":"key","key":"addEntity"},{"type":"invoke","args":[{"type":"traversal","steps":[{"type":"key","key":"item"}]}]}]},{"type":"traversal","steps":[{"type":"key","key":"item"},{"type":"key","key":"setPosition"},{"type":"invoke","args":[{"type":"traversal","steps":[{"type":"key","key":"user"},{"type":"key","key":"position"}]}]}]},{"type":"traversal","steps":[{"type":"key","key":"item"},{"type":"key","key":"direction"}],"value":{"type":"traversal","steps":[{"type":"key","key":"user"},{"type":"key","key":"direction"}]}},{"type":"traversal","steps":[{"type":"key","key":"item"},{"type":"key","key":"moveFor"},{"type":"invoke","args":[{"type":"literal","value":0.5}]}]},{"type":"traversal","steps":[{"type":"key","key":"user"},{"type":"key","key":"list"},{"type":"key","key":"removeEntity"},{"type":"invoke","args":[{"type":"traversal","steps":[{"type":"key","key":"item"}]}]}]}]},"slotImages":{"default":"/rock.png"}}},"layered":{},"listed":{},"mobile":{"state":{"speed":200}},"physical":{},"pictured":{"params":{"images":{"initial":{"offset":[0,0],"size":[12,12],"uri":"/rock.png"}}}},"positioned":{},"roomed":{},"shaped":{"params":{"shape":{"type":"rectangle","position":[0,0],"size":[12,12]}}},"visible":{}}}
\ No newline at end of file
diff --git a/resource/rock.png b/resource/rock.png
new file mode 100644
index 0000000..82e7043
Binary files /dev/null and b/resource/rock.png differ
diff --git a/server/create-fixtures.js b/server/create-fixtures.js
index 2589862..0655124 100644
--- a/server/create-fixtures.js
+++ b/server/create-fixtures.js
@@ -28,6 +28,8 @@ writeFixture('mama-kitty.entity.json', mamaKittyJSON());
 // Write items.
 import {potionJSON} from './fixtures/potion.entity';
 writeFixture('potion.entity.json', potionJSON());
+import {rockJSON} from './fixtures/rock.entity';
+writeFixture('rock.entity.json', rockJSON());
 // Write rooms.
 import {kittyFireJSON} from './fixtures/kitty-fire.room';
 writeFixture('kitty-fire.room.json', kittyFireJSON());
diff --git a/server/fixtures/rock.entity.js b/server/fixtures/rock.entity.js
new file mode 100644
index 0000000..537ddee
--- /dev/null
+++ b/server/fixtures/rock.entity.js
@@ -0,0 +1,123 @@
+import {buildInvoke, buildTraversal} from '@avocado/behavior';
+
+import {AFFINITY_NONE} from '../../common/combat/constants';
+
+// Healing potion.
+export function rockJSON() {
+  // Set as not damaging to user.
+  const setDoesNotDamageUser = buildInvoke(
+    ['item', 'setDoesNotDamage'],
+    [
+      buildTraversal(['user']),
+    ],
+  );
+  // Add item to list.
+  const addToList = buildInvoke(
+    ['user', 'list', 'addEntity'],
+    [
+      buildTraversal(['item']),
+    ],
+  );
+  // Set item to user position.
+  const setToUserPosition = buildInvoke(
+    ['item', 'setPosition'],
+    [
+      buildTraversal(['user', 'position']),
+    ],
+  );
+  // Move in direction user is facing for 1 second.
+  const turn = buildTraversal(
+    ['item', 'direction'],
+    buildTraversal(['user', 'direction']),
+  );
+  const move = buildInvoke(['item', 'moveFor'], [
+    0.5,
+  ]);
+  // Remove from list.
+  const removeFromList = buildInvoke(
+    ['user', 'list', 'removeEntity'],
+    [
+      buildTraversal(['item']),
+    ],
+  );
+  return {
+    traits: {
+      collider: {
+        params: {
+          isSensor: true,
+        },
+      },
+      damaging: {
+        params: {
+          damageSpecs: [
+            {
+              affinity: AFFINITY_NONE,
+              lock: 0.25,
+              power: 50,
+              variance: 0.1,
+            },
+          ],
+        },
+      },
+      directional: {
+        params: {
+          directionCount: 4,
+        },
+      },
+      existent: {
+        state: {
+          name: 'Rock',
+        },
+      },
+      item: {
+        params: {
+          itemActions: {
+            type: 'actions',
+            traversals: [
+              setDoesNotDamageUser,
+              addToList,
+              setToUserPosition,
+              turn,
+              move,
+              removeFromList,
+            ],
+          },
+          slotImages: {
+            default: '/rock.png',
+          },
+        },
+      },
+      layered: {},
+      listed: {},
+      mobile: {
+        state: {
+          speed: 200,
+        },
+      },
+      physical: {},
+      pictured: {
+        params: {
+          images: {
+            initial: {
+              offset: [0, 0],
+              size: [12, 12], // Derive?
+              uri: '/rock.png',
+            },
+          }
+        },
+      },
+      positioned: {},
+      roomed: {},
+      shaped: {
+        params: {
+          shape: {
+            type: 'rectangle',
+            position: [0, 0],
+            size: [12, 12],
+          },
+        },
+      },
+      visible: {},
+    },
+  };
+}