class npc_icc_sister_svalna : public CreatureScript
{
    public:
        npc_icc_sister_svalna() : CreatureScript("npc_icc_sister_svalna") { }

        struct npc_icc_sister_svalnaAI : public ScriptedAI
        {
            npc_icc_sister_svalnaAI(Creature* pCreature) : ScriptedAI(pCreature)
            {
                pInstance = pCreature->GetInstanceScript();

            }

            void JustDied(Unit* killer)
            {
                me->GetInstanceScript()->SetData(DATA_VALITHRIA_ENTRANCE,1);
            }

            void EnterCombat(Unit *who)
            {}

            void UpdateAI(const uint32 diff)
            {
                if (!UpdateVictim())
                    return;
                if (!me->isInCombat())
                    return;
				events.Update(diff);
				if (me->HasUnitState(UNIT_STAT_CASTING))
					return;
				while (uint32 eventId = events.ExecuteEvent())
				{
                    switch (eventId)
                    {
						case EVENT_CAST_AETHER_BURST
							DoCast(SPELL_AETHER_BURST);
                            events.ScheduleEvent(EVENT_AETHER_BURST, 15000);
                            break;
						case EVENT_AETHER_SHIELD:
                            bAetherShieldReady = true;
                            events.ScheduleEvent(EVENT_AETHER_SHIELD, 45000);
                            break;


                DoMeleeAttackIfReady();