Game sages said it will be available later in gold chests. I'm not exactly thrilled about this tactics either, but in the end they have to get money from somewhere and, to be honest, at this point this is probably the only way they could attract some whales and p2p players to open their wallets. The initial price was crazy though, but today I got the new hero by spending 7500 diamonds and also got a lot of stamina packs in the process. On my server, looking at the top players who are most likely to spend, only 11 people got the new hero, so I wouldn't say these chests are a great success, but they still convinced some people to spend money or their accumulated diamonds. Can't think of any other promo lately that could entice people to spend, as I didn't feel the need to buy anything in more than a year and I'm still going strong with the diamonds I get from coli/pit. Spenders need to feel the "exclusivity" or else they wouldn't spend money and money is what makes this game rolling. I wish they would have made the soulstones available in gold chests or as a contest prize, but I really can't blame them for trying to earn money from an exclusive hero that will be available later for everybody. I just hope it doesn't become the norm, although I have a feeling the other two dragons will be exclusive as well, due to the fact they won't release any other heroes for a while.