@SubscribeEvent
public void onEntityJoin(EntityJoinWorldEvent event){
if(!event.entity.worldObj.isRemote && event.entity != null && event.entity instanceof EntityLivingBase)
{
EntityLivingBase entity = (EntityLivingBase)event.entity;
entity.getEntityAttribute(SharedMonsterAttributes.knockbackResistance).setBaseValue(2D);
}
}