[Hearthstone] Unlocking Golden Gul'dan (Warlock)

Whenever a player completes 500 wins in Ranked Play(huge achievement)mode with a given hero, that hero will be permanently replaced with a golden version. These are similar to golden cards, with golden borders and special animations, and will automatically be used instead of the regular version, in Casual and Ranked play, as well as Duels, but will not be used for Arena.

Decks used:
- Murloc
- Zoo