Question: If I create a golden card, are there any special perks in battle? I am just wondering since I am planning to level Anduin to 15 and get the golden Mind Blast and I want to know if there are any perks. Thanks!

Answer: 
Other than looking cool, Golden cards hold no benefit.

They are however worth significantly more if you want to turn them into dust
Just adding to another good answers, looking Golden Soulbounded cards can tell you an estimate of opponent level. By example, if your opponent has a Golden StormWind Champion, your opponent is level 59/60 with Paladin class!

<http://hearthstone.gamepedia.com/Paladin#Level_11-60>