For those of you looking at buying this - it's a game that requires an app that is no longer on the iphone app store, nor android app store.
For android users you can still find the .apk online and download it as well as it's on the amazon android app store. Last time I tried it out it was fairly stable, so it does still work. As far as account creation and creating custom forces I'm not sure if that will work anymore and that was going to be the meat of the game for most people - being able to customize your golem riders and what spells they have access to.
Also as an aside - the last time I played using the app (~1 year ago) the app kept crashing while using the bone colossus (4 factions, gems/blood/wood/bone basically, colossus sized golems were released for all but the wood faction).