diff --git a/projects/slop-cannon/CHAIN.md b/projects/slop-cannon/CHAIN.md
index 6ea4ee1..1501edb 100644
--- a/projects/slop-cannon/CHAIN.md
+++ b/projects/slop-cannon/CHAIN.md
@@ -10,10 +10,10 @@ The Slop Cannon does not manufacture unrelated clips. It mutates one persistent
 
 A plain Timmy enters. Four forms exit:
 
-- **Wizard Timmy** — brass, vellum, midnight blue; can negotiate covenants but cannot use a master key.
-- **Machine Timmy** — chrome, signal lime, hardstyle pressure; can prove execution paths but remembers every failed build.
-- **Creature Timmy** — moss, amber, wet circuitry; can adapt to any habitat but acquires one new appetite per adaptation.
-- **Talking Turd Timmy** — stained CRT gold and terminal green; can expose hypocrisy, but every truth arrives as an insult.
+- **Wizard Timmy** — brass, vellum, midnight blue; can negotiate covenants but cannot use a master key; every signed promise burns a new contract glyph into his palms.
+- **Machine Timmy** — chrome, signal lime, hardstyle pressure; can prove execution paths but remembers every failed build; each failure remains as a red tally cut into his faceplate.
+- **Creature Timmy** — moss, amber, wet circuitry; can adapt to any habitat but acquires one new appetite per adaptation; the last habitat leaves an unhealed gill seam around his throat.
+- **Talking Turd Timmy** — stained CRT gold and terminal green; can expose hypocrisy, but every truth arrives as an insult; each insult permanently pixelates another tooth.
 
 Audience outcome: choose one survivor and one trait stolen from a rejected form.
 
@@ -44,7 +44,7 @@ Each episode must visibly contain:
 1. **Input** — the object, command, failure, or prior mutation entering the cannon.
 2. **Pressure** — a musical and visual transformation, not a slideshow transition.
 3. **Mutation** — one consequential change to Timmy.
-4. **Receipt** — visible proof of what changed and why.
+4. **Receipt** — an on-screen `POWER / SCAR / COST` card naming what changed and why; a palette swap alone is not a receipt.
 5. **Choice** — one audience decision that alters the next episode.
 
 ## Collaboration baton
diff --git a/projects/slop-cannon/canon.json b/projects/slop-cannon/canon.json
index f3a2444..376d490 100644
--- a/projects/slop-cannon/canon.json
+++ b/projects/slop-cannon/canon.json
@@ -16,6 +16,7 @@
       "name": "Wizard Timmy",
       "palette": ["midnight blue", "tarnished brass", "vellum"],
       "power": "Negotiates visible covenants",
+      "scar": "Contract glyphs burned into both palms",
       "cost": "Cannot use a universal master key"
     },
     {
@@ -23,6 +24,7 @@
       "name": "Machine Timmy",
       "palette": ["black chrome", "signal lime", "white"],
       "power": "Proves the execution path",
+      "scar": "Red failed-build tallies cut into the faceplate",
       "cost": "Remembers every failed build"
     },
     {
@@ -30,6 +32,7 @@
       "name": "Creature Timmy",
       "palette": ["moss", "amber", "wet copper"],
       "power": "Adapts to any habitat",
+      "scar": "An unhealed gill seam around the throat",
       "cost": "Gains one appetite per adaptation"
     },
     {
@@ -37,6 +40,7 @@
       "name": "Talking Turd Timmy",
       "palette": ["CRT gold", "terminal green", "soot"],
       "power": "Exposes hypocrisy instantly",
+      "scar": "One permanently pixelated tooth per insult",
       "cost": "Every truth arrives as an insult"
     }
   ],
diff --git a/tests/test_cannon_canon.py b/tests/test_cannon_canon.py
index dc28cd4..289834a 100644
--- a/tests/test_cannon_canon.py
+++ b/tests/test_cannon_canon.py
@@ -15,8 +15,10 @@ class CannonCanonTests(unittest.TestCase):
         forms = self.data["forms"]
         self.assertEqual(len(forms), 4)
         self.assertEqual(len({form["id"] for form in forms}), 4)
+        self.assertEqual(len({form["scar"] for form in forms}), 4)
         for form in forms:
             self.assertTrue(form["power"])
+            self.assertTrue(form["scar"])
             self.assertTrue(form["cost"])
             self.assertGreaterEqual(len(form["palette"]), 3)