Altar of Tempest/1.03.24

Barbarian
The Altar of Tempest serves a few important roles for the Barbarians. Firstly, the building is the Barbarians' main research building, offering a variety of differing researches. Secondly, it allows production for a second basic flier but, more importantly, it produces / summons the Barbarian Titan. Usually you would only build one of each research building, but considering that the building also produces units, it is entirely plausible to build multiple Altars of Tempest right at tier 3. This allows for rapid researching and then doubles as a production factory for Lightning Hawks. What makes this even more practical is that the Altar of Tempest is a rather small building and doesn't cost much, especially since it requires the almost-unused crystal resource. Further more, as the only units it produces are all fliers, including their Titan, little thought is needed as to where to place the building, as the produced units wont ever get stuck on the lack of ground space.