Shadowspire
Shadowspire is a fictional criminal organization which appears in DC Comics. Their first recorded appearance is in "Deathstroke" #53. The group was created by Tom Joyner and Mike Collins. Fictional team history. The symbol of Shadowspire was a black tower against a red sky and set within a black diamond shape. Shadowspire supplied South American drug cartels with the necessary tools of their trade: weapons, transportation, high technology and reliable intelligence. Shadowspire's tentacles penetrate every corrupt government and drug cartel on two continents. They even had the resources and know-how to create their own weaponized viruses. Through  the costumed agent known as Mourn, Shadowspire attempted to unleash the Borgia Plague in Washington, D.C. Their stated objective was "opening new markets". The objective of Mourn's mission was to ensure that the President of the United States and those next in line for succession be killed by the Borgia Plague. According to Mourn: "Without a central government, the U.S. will disintegrate faster than Yugoslavia. There's so much anger against the federal government — so much tension over race, religion and resources — there'll be a civil war all over the continent inside of six months. The economy will  go to hell, and the rest of the world won't be far behind. And guess who profits when anarchy reigns?" Shadowspire's mysterious "Chief of Shadows" was the Baron (Baron Blitzkrieg), who was, in Mourn's opinion, one of the ten most dangerous men on the planet. Among the Baron's other operatives were Steelhawk and Kodrescu. The Borgia Plague plot was averted by Deathstroke, but despite Deathstroke's best efforts, Mourn succeeded in placing a bomb in the Capitol Building, an action which culminated in an explosion that killed the assassin and hundreds of innocent workers, legislators and  staff throughout the building. Shadowspire later resurfaces in the pages of "Damage", a comic book that was also written by Tom Joyner; they frequently clashed with Damage throughout the series. They more recently resurfaced in the pages of "Power Company" #11. In other media. The group first appears in the fourth season of "Arrow", debuting in "A.W.O.L." in present day storyline, but they are seen prominently in flashbacks. For the latter, it is led by Baron Reiter, while in present is former U.S Army lieutenant Joyner. The group kills Amanda Waller as they attempt to steal the Rubicon codes from  A.R.G.U.S., but are ultimately stopped by Team Arrow.