Fixed Encounter Boss Faerlina:

+ fixed in combat with summons, you cannot skip them now
+ fixed naxxramas woshipper immunity: they are not immune to charm spells in 25 mode
+ fixed invisible Widow's Embrace spell in possessed npc bar

src/game/Entities/Unit/Unit.cpp

@@ -14502,7 +14502,7 @@ void CharmInfo::InitPossessCreateSpells()
         {
             uint32 spellId = _unit->ToCreature()->m_spells[i];
             SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(spellId);
-            if (spellInfo && !spellInfo->HasAttribute(SPELL_ATTR0_CASTABLE_WHILE_DEAD))
+            if (spellInfo)
             {
                 if (spellInfo->IsPassive())
                     _unit->CastSpell(_unit, spellInfo, true);
@@ -14532,7 +14532,7 @@ void CharmInfo::InitCharmCreateSpells()
         uint32 spellId = _unit->ToCreature()->m_spells[x];
         SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(spellId);
 
-        if (!spellInfo || spellInfo->HasAttribute(SPELL_ATTR0_CASTABLE_WHILE_DEAD))
+        if (!spellInfo)
         {
             _charmspells[x].SetActionAndType(spellId, ACT_DISABLED);
             continue;

src/scripts/Northrend/Naxxramas/boss_faerlina.cpp

@@ -90,7 +90,7 @@ public:
         void EnterCombat(Unit * who)
         {
             BossAI::EnterCombat(who);
-            me->SetInCombatWithZone();
+            summons.DoZoneInCombat();
             Talk(SAY_AGGRO);
             events.ScheduleEvent(EVENT_SPELL_POISON_BOLT, urand(12000,15000));
             events.ScheduleEvent(EVENT_SPELL_RAIN_OF_FIRE, urand(6000,18000));