This quest is not available in game.
Bring Falthir the Sightless a Primal Hakkari Armsplint. You must also have a reputation equal to or greater than Friendly with the Zandalar Tribe.
Falthir the Sightless is located on Yojamba Isle, Stranglethorn Vale.
The madcaps of Zandalar are similar to rogues, but above all else they embrace madness... chaos... the unpredictability of existence. A terror to behold on the battlefield, they sowed the seeds of confusion and mayhem amongst our enemies in the savage times after the tribes splintered. We would not be here today without them.
Bring to me the Paragons of Power from Zul'Gurub that I seek, and I will grant you the first of the madcap's prized armors. Embrace the madness!