Board Thread:Warhammer 40k General Discussion/@comment-96.237.238.119-20131218020230/@comment-74.128.152.190-20140112030653

The Tau overzealously expand their drone technology and after its inevitable rise to full sentience it uses the Tau's weapons against them (Skynet anyone?), destroys the Tau and migrates across the Galaxy. It doesn't have any living vessels and as such its much less restrictedto what type of planet it can colonize.

Eventually it comes into contact with the Necrons. Technologically speaking, they are evenly matched. The Tau Drone AI infiltrates the Necron command protocol and hastens the awakening of every Tomb World in the Galaxy. Once awakened the Necrons (with subtle input from the Drone AI) goes on a massacre of a galactic scale killing everything living before activating its Agent Smith takeover program. A combination of Tau and Necron Tech allows the construction of more powerful and efficient Cadian Pylons that, when placed at strategic points, cuts off any and all warp storms and portals (Yes, even the EoT is shut forever). Thus the Drone AI controls the Galaxy using its Tau technology spliced with Necron/C'Tan tech.

Using its nigh unbeatable railgun/gauss combo weapons, the Drone AI easily holds the line against the encroaching Tyranids who are unable to adapt appropriately to weapons of the Drone AI (that is, adapting to Tau plasma tech makes the nids vulnerable to Necron gauss tech).