diff --git a/data/Data5.js b/data/Data5.js
index 083a981..d4b8a8f 100644
--- a/data/Data5.js
+++ b/data/Data5.js
@@ -162,7 +162,6 @@ var arcana2Combos = [
     { 'source': ['Chariot', 'Star'], 'result': 'Moon' },
     { 'source': ['Chariot', 'Moon'], 'result': 'Lovers' },
     { 'source': ['Chariot', 'Sun'], 'result': 'Priestess' },
-    { 'source': ['Chariot', 'Judgement'], 'result': 'Hierophant' },
     { 'source': ['Justice', 'Justice'], 'result': 'Justice' },
     { 'source': ['Justice', 'Hermit'], 'result': 'Magician' },
     { 'source': ['Justice', 'Fortune'], 'result': 'Emperor' },
@@ -175,7 +174,6 @@ var arcana2Combos = [
     { 'source': ['Justice', 'Star'], 'result': 'Empress' },
     { 'source': ['Justice', 'Moon'], 'result': 'Devil' },
     { 'source': ['Justice', 'Sun'], 'result': 'Hanged Man' },
-    { 'source': ['Justice', 'Judgement'], 'result': 'Tower' },
     { 'source': ['Hermit', 'Hermit'], 'result': 'Hermit' },
     { 'source': ['Hermit', 'Fortune'], 'result': 'Star' },
     { 'source': ['Hermit', 'Strength'], 'result': 'Hierophant' },
@@ -208,7 +206,6 @@ var arcana2Combos = [
     { 'source': ['Strength', 'Star'], 'result': 'Moon' },
     { 'source': ['Strength', 'Moon'], 'result': 'Magician' },
     { 'source': ['Strength', 'Sun'], 'result': 'Moon' },
-    { 'source': ['Strength', 'Judgement'], 'result': 'Fortune' },
     { 'source': ['Hanged Man', 'Hanged Man'], 'result': 'Hanged Man' },
     { 'source': ['Hanged Man', 'Death'], 'result': 'Moon' },
     { 'source': ['Hanged Man', 'Temperance'], 'result': 'Death' },
@@ -225,7 +222,6 @@ var arcana2Combos = [
     { 'source': ['Death', 'Star'], 'result': 'Devil' },
     { 'source': ['Death', 'Moon'], 'result': 'Hierophant' },
     { 'source': ['Death', 'Sun'], 'result': 'Priestess' },
-    { 'source': ['Death', 'Judgement'], 'result': 'Magician' },
     { 'source': ['Temperance', 'Temperance'], 'result': 'Temperance' },
     { 'source': ['Temperance', 'Devil'], 'result': 'Fool' },
     { 'source': ['Temperance', 'Tower'], 'result': 'Fortune' },
diff --git a/data/Data5.ts b/data/Data5.ts
index a4a0e7c..3c95b14 100644
--- a/data/Data5.ts
+++ b/data/Data5.ts
@@ -164,7 +164,6 @@ const arcana2Combos = [
     {'source': ['Chariot',    'Star'        ], 'result': 'Moon'        },
     {'source': ['Chariot',    'Moon'        ], 'result': 'Lovers'      },
     {'source': ['Chariot',    'Sun'         ], 'result': 'Priestess'   },
-    {'source': ['Chariot',    'Judgement'   ], 'result': 'Hierophant'  },
     {'source': ['Justice',    'Justice'     ], 'result': 'Justice'     },
     {'source': ['Justice',    'Hermit'      ], 'result': 'Magician'    },
     {'source': ['Justice',    'Fortune'     ], 'result': 'Emperor'     },
@@ -177,7 +176,6 @@ const arcana2Combos = [
     {'source': ['Justice',    'Star'        ], 'result': 'Empress'     },
     {'source': ['Justice',    'Moon'        ], 'result': 'Devil'       },
     {'source': ['Justice',    'Sun'         ], 'result': 'Hanged Man'  },
-    {'source': ['Justice',    'Judgement'   ], 'result': 'Tower'       },
     {'source': ['Hermit',     'Hermit'      ], 'result': 'Hermit'      },
     {'source': ['Hermit',     'Fortune'     ], 'result': 'Star'        },
     {'source': ['Hermit',     'Strength'    ], 'result': 'Hierophant'  },
@@ -210,7 +208,6 @@ const arcana2Combos = [
     {'source': ['Strength',   'Star'        ], 'result': 'Moon'        },
     {'source': ['Strength',   'Moon'        ], 'result': 'Magician'    },
     {'source': ['Strength',   'Sun'         ], 'result': 'Moon'        },
-    {'source': ['Strength',   'Judgement'   ], 'result': 'Fortune'     },
     {'source': ['Hanged Man', 'Hanged Man'  ], 'result': 'Hanged Man'  },
     {'source': ['Hanged Man', 'Death'       ], 'result': 'Moon'        },
     {'source': ['Hanged Man', 'Temperance'  ], 'result': 'Death'       },
@@ -227,7 +224,6 @@ const arcana2Combos = [
     {'source': ['Death',      'Star'        ], 'result': 'Devil'       },
     {'source': ['Death',      'Moon'        ], 'result': 'Hierophant'  },
     {'source': ['Death',      'Sun'         ], 'result': 'Priestess'   },
-    {'source': ['Death',      'Judgement'   ], 'result': 'Magician'    },
     {'source': ['Temperance', 'Temperance'  ], 'result': 'Temperance'  },
     {'source': ['Temperance', 'Devil'       ], 'result': 'Fool'        },
     {'source': ['Temperance', 'Tower'       ], 'result': 'Fortune'     },
diff --git a/src/FusionCalculator.js b/src/FusionCalculator.js
index 60563f2..02d1bc9 100644
--- a/src/FusionCalculator.js
+++ b/src/FusionCalculator.js
@@ -86,6 +86,10 @@ var FusionCalculator = (function () {
         }
         var level = 1 + Math.floor((persona1.level + persona2.level) / 2);
         var arcana = getResultArcana(persona1.arcana, persona2.arcana);
+        if (!arcana) {
+            // only Judgement + [Justice/Strength/Chariot/Death] can result in this
+            return null;
+        }
         var personae = this.personaeByArcana[arcana];
         var persona = null;
         var found = false;
diff --git a/src/FusionCalculator.ts b/src/FusionCalculator.ts
index bbdffc6..af06433 100644
--- a/src/FusionCalculator.ts
+++ b/src/FusionCalculator.ts
@@ -100,6 +100,11 @@ class FusionCalculator {
 
         let level = 1 + Math.floor((persona1.level + persona2.level) / 2);
         let arcana = getResultArcana(persona1.arcana, persona2.arcana);
+        if (!arcana) {
+            // only Judgement + [Justice/Strength/Chariot/Death] can result in this
+            return null;
+        }
+
         let personae = this.personaeByArcana[arcana];
 
         let persona: PersonaData = null;
diff --git a/test/FusionTest.js b/test/FusionTest.js
index 7b3bc2f..6a92aaf 100644
--- a/test/FusionTest.js
+++ b/test/FusionTest.js
@@ -74,7 +74,7 @@ describe('FusionCalculator', function () {
                 expect(fuseTestWrapper("Crystal Skull", "Regent")).to.equal(personaMap["Mithra"]);
             });
         });
-        describe('special fusion)', function () {
+        describe('special fusion', function () {
             it('should return Alice when fusing Nebiros and Belial', function () {
                 expect(fuseTestWrapper("Nebiros", "Belial")).to.equal(personaMap["Alice"]);
             });
@@ -99,6 +99,22 @@ describe('FusionCalculator', function () {
                 expect(fuseTestWrapper("Orlov", "Neko Shogun")).to.equal(personaMap["Kaiwan"]);
             });
         });
+        describe('impossible fusions with Judgement', function () {
+            it('should return null when fusing Judgement + Death', function () {
+                expect(fuseTestWrapper("Messiah", "Mandrake")).to.equal(null);
+                expect(fuseTestWrapper("Trumpeter", "Hell Biker")).to.equal(null);
+            });
+            it('should return null when fusing Judgement + Chariot', function () {
+                expect(fuseTestWrapper("Messiah", "Agathion")).to.equal(null);
+            });
+            it('should return null when fusing Judgement + Strength', function () {
+                expect(fuseTestWrapper("Messiah Picaro", "Kelpie")).to.equal(null);
+            });
+            it('should return null when fusing Judgement + Justice', function () {
+                expect(fuseTestWrapper("Messiah Picaro", "Angel")).to.equal(null);
+                expect(fuseTestWrapper("Power", "Anubis")).to.equal(null);
+            });
+        });
     });
     describe('#getRecipes()', function () {
         describe('special fusions', function () {
diff --git a/test/FusionTest.ts b/test/FusionTest.ts
index d716ee8..ea4c686 100644
--- a/test/FusionTest.ts
+++ b/test/FusionTest.ts
@@ -94,7 +94,7 @@ describe('FusionCalculator', () => {
             });
         });
 
-        describe('special fusion)', function () {
+        describe('special fusion', function () {
             it('should return Alice when fusing Nebiros and Belial', () => {
                 expect(fuseTestWrapper("Nebiros", "Belial")).to.equal(personaMap["Alice"]);
             });
@@ -125,6 +125,26 @@ describe('FusionCalculator', () => {
                 expect(fuseTestWrapper("Orlov", "Neko Shogun")).to.equal(personaMap["Kaiwan"]);
             });
         });
+
+        describe('impossible fusions with Judgement', function () {
+            it('should return null when fusing Judgement + Death', () => {
+                expect(fuseTestWrapper("Messiah", "Mandrake")).to.equal(null);
+                expect(fuseTestWrapper("Trumpeter", "Hell Biker")).to.equal(null);
+            });
+
+            it('should return null when fusing Judgement + Chariot', () => {
+                expect(fuseTestWrapper("Messiah", "Agathion")).to.equal(null);
+            });
+
+            it('should return null when fusing Judgement + Strength', () => {
+                expect(fuseTestWrapper("Messiah Picaro", "Kelpie")).to.equal(null);
+            });
+
+            it('should return null when fusing Judgement + Justice', () => {
+                expect(fuseTestWrapper("Messiah Picaro", "Angel")).to.equal(null);
+                expect(fuseTestWrapper("Power", "Anubis")).to.equal(null);
+            });
+        });
     });
 
     describe('#getRecipes()', () => {