Hearthstone Packs - Special Tin Bundle/System

You know how they sell tins or special bundles in Yu-Gi-Oh? Hearthstone could use some of that idea.

In each special "Tin Bundle of Packs", you would receive a determined number of packs from each "collection". In addition to those packs you receive, say, a high rarity card or high rarity golden card. Ideally, this bundle would be a bit cheaper than buying the packs individually and build in some diversification.

Another idea for the special card would be a special pack that contains 1-3 golden cards, or 1-3 higher rarity cards for a "special pack".