Core/Spells:

* fixed Shatter not granting its crit chance properly
* fixed Last Word crit chance bonus

src/server/game/Entities/Unit/Unit.cpp

@@ -7149,15 +7149,14 @@ float Unit::GetUnitSpellCriticalChance(Unit* victim, SpellInfo const* spellProto
 
                     switch ((*i)->GetMiscValue())
                     {
-                        case 11170: // Shatter
-                        case 12982:
+                        case 911: // Shatter
                             if (victim->HasAuraState(AURA_STATE_FROZEN, spellProto, this))
                                 crit_chance *= 2;
                             else if (spellProto->SpellFamilyFlags[0] & 0x00020000 || spellProto->SpellFamilyFlags[1] & 0x00100000)
                                 if (GetAuraEffect(SPELL_AURA_ABILITY_IGNORE_AURASTATE, SPELLFAMILY_MAGE, 0, 0, 0x0000000A, GetGUID()))
                                     crit_chance *= 2;
                             break;
-                        case 7917: // Glyph of Shadowburn
+                        case 7: // Last Word
                             if (victim->HasAuraState(AURA_STATE_HEALTHLESS_35_PERCENT, spellProto, this))
                                 crit_chance += (*i)->GetAmount();
                             break;

src/server/game/Spells/SpellMgr.cpp

@@ -5611,6 +5611,15 @@ void SpellMgr::LoadSpellInfoCorrections()
         spellInfo->SpellFamilyName = SPELLFAMILY_SHAMAN;
     });
 
+    // Last Word
+    ApplySpellFix({
+        20234,
+        20235,
+    }, [](SpellInfo* spellInfo)
+    {
+       spellInfo->Effects[EFFECT_0].ApplyAuraName = SPELL_AURA_OVERRIDE_CLASS_SCRIPTS;
+    });
+
     for (uint32 i = 0; i < GetSpellInfoStoreSize(); ++i)
     {
         SpellInfo* spellInfo = mSpellInfoMap[i];