ICC check for enter(2)

diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp
index be7375b..dda70d0 100755
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_lord_marrowgar.cpp
@@ -106,8 +106,15 @@ class boss_lord_marrowgar : public CreatureScript
                 events.ScheduleEvent(EVENT_ENRAGE, 600000);
             }

-            void EnterCombat(Unit* /*who*/)
+            void EnterCombat(Unit* who)
             {
+               if (!instance->CheckRequiredBosses(DATA_LORD_MARROWGAR, who->ToPlayer()))
+                {
+                    EnterEvadeMode();
+                    instance->DoCastSpellOnPlayers(LIGHT_S_HAMMER_TELEPORT);
+                    return;
+                }
+
                 Talk(SAY_AGGRO);

                 me->setActive(true);
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp b/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
index 25d8618..994e273 100755
--- a/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp
@@ -15,6 +15,7 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */

+#include "Group.h"
 #include "ObjectMgr.h"
 #include "ScriptMgr.h"
 #include "InstanceScript.h"
@@ -960,6 +976,23 @@ class instance_icecrown_citadel : public InstanceMapScript
             {
                 if (player && player->isGameMaster())
                     return true;
+
+               if (player && ((instance->GetDifficulty() == RAID_DIFFICULTY_10MAN_HEROIC) ||
+                   (instance->GetDifficulty() == RAID_DIFFICULTY_25MAN_HEROIC)))
+               {
+                   uint64 _leaderguid;
+                   _leaderguid = player->GetGroup()->GetLeaderGUID();
+                   Player* _leader = sObjectMgr->GetPlayer(_leaderguid);
+                   if (!_leader || !player->IsInMap(_leader))
+                       return false;
+                   switch (instance->GetDifficulty())
+                   {
+                       case RAID_DIFFICULTY_10MAN_HEROIC:
+                           return _leader->GetAchievementMgr().HasAchieved(sAchievementStore.LookupEntry(4530));
+                       case RAID_DIFFICULTY_25MAN_HEROIC:
+                           return _leader->GetAchievementMgr().HasAchieved(sAchievementStore.LookupEntry(4597));
+                   }
+               }

                 switch (bossId)
                 {