Flosstradamus, the Chicago DJ duo of J2K and Autobot, are a typist's nightmare with their latest single and mixtape. The mixtape is called B?NNED; Flosstradamus' just-released song off that mixtape is "UNDERGR?UND ANTHEM." That's a lot of symbols I wasn't aware even existed on a keyboard. Regardless, this track is a relentless, rage-worthy bit of electro. And New Yorkers, Flosstradamus will be playing East River Park tomorrow night with AraabMUZIK, Teengirl Fantasy and Nick Hook. Listen below.