Sky Golem is the new awesome engineering mount that is available since patch 5.4. To learn the recipe for crafting the mount, you need to get “Schematic: Chief Engineer Jard’s Journal“, an item drop from Siege of Orgrimmar.
To craft the golem, you need 30 x Jard’s Peculiar Energy Source and 30 x Living Steel.
The Jard’s Peculiar Energy Source items can be crafted by engineers, 1 per day. They require only 10 Ghost Iron Bars (quite cheap mats).
Living Steel can be crafted by Alchemists, only 1 per day.
If other of your characters don’t have Alchemy, you need to find a friend that has. Provide him 6 Trillium Bars each day and he can transmute one Living Steel. The Trillium Bars are not that cheap. Around 100 gold for one piece and you need 6 for at least 1 Living Steel.
The good thing is that your alchemist has a chance to craft from 1 to 4 Living Steels at once. Usually he only transmutes one.
So you need 30 days to craft the golem.
Around 20-30k gold is required to craft this mount.
Is it worth it? If you don’t have what to do with gold, it sure does. If your looking to get some fun in the game, you should definitely want to get the mount. And if you are an engineer, you should craft the mount to show your skill.