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java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.NullPointerException at java.util.concurrent.FutureTask.report(FutureTask.java:122)[?:1.8.0_31] at java.util.concurrent.FutureTask.get(FutureTask.java:192)[?:1.8.0_31] at net.minecraft.util.Util.func_181617_a(SourceFile:46)[h.class:?] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)[MinecraftServer.class:?] at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387)[ld.class:?] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)[MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)[MinecraftServer.class:?] at java.lang.Thread.run(Thread.java:745)[?:1.8.0_31]Caused by: java.lang.NullPointerException at am2.bosses.EntityArcaneGuardian.func_70628_a(EntityArcaneGuardian.java:216)[EntityArcaneGuardian.class:?] at net.minecraft.entity.EntityLivingBase.func_184610_a(EntityLivingBase.java:1100)[sf.class:?] at net.minecraft.entity.EntityLiving.func_184610_a(EntityLiving.java:555)[sg.class:?] at net.minecraft.entity.EntityLivingBase.func_70645_a(EntityLivingBase.java:1080)[sf.class:?] at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:970)[sf.class:?] at net.minecraft.entity.monster.EntityMob.func_70097_a(SourceFile:73)[yx.class:?] at am2.bosses.AM2Boss.func_70097_a(AM2Boss.java:189)[AM2Boss.class:?] at am2.bosses.EntityArcaneGuardian.func_70097_a(EntityArcaneGuardian.java:108)[EntityArcaneGuardian.class:?] at am2.bosses.AM2Boss.func_70965_a(AM2Boss.java:199)[AM2Boss.class:?] at net.minecraft.entity.boss.EntityDragonPart.func_70097_a(SourceFile:40)[wz.class:?] at net.minecraft.entity.player.EntityPlayer.func_71059_n(EntityPlayer.java:1293)[zs.class:?] at net.minecraft.entity.player.EntityPlayerMP.func_71059_n(EntityPlayerMP.java:1226)[lu.class:?] at net.minecraft.network.NetHandlerPlayServer.func_147340_a(NetHandlerPlayServer.java:1040)[me.class:?] at net.minecraft.network.play.client.CPacketUseEntity.func_148833_a(SourceFile:68)[iu.class:?] at net.minecraft.network.play.client.CPacketUseEntity.func_148833_a(SourceFile:12)[iu.class:?] at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13)[fl$1.class:?] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[?:1.8.0_31] at java.util.concurrent.FutureTask.run(FutureTask.java:266)[?:1.8.0_31] at net.minecraft.util.Util.func_181617_a(SourceFile:45)[h.class:?] ... 5 more