With the Cult rising under Severin Silrajin, Leosin enacted a desperate gambit: to infiltrate a city he predicted would be targeted—Greenest—and allow himself to be captured. The plan worked too well. Tortured and barely alive, he was found in a cultist encampment by a group of unlikely heroes: the adventurers later known as The Five Guys. Freed by their hand, Leosin became their Harper liaison, guiding them first to Elturel and into alliance with Onthar Frume, Enna Baenre and, in one of history’s crueler ironies, the two struck up a genuine friendship—each unaware of the other’s affiliation.
Leosin parted ways with the Five Guys during their mission to the Mere of Dead Men, instead tracking the cult’s stolen hoards northward, and ultimately helping bring down Skyreach, the flying fortress of Varram Khordulfrost, also called the Pale Eye. While others rested from the frostbitten victory, it was Leosin who rallied the five major factions of Velkarn to convene in Waterdeep, the City of Splendors, forming the tentative alliance that would become the Council of Waterdeep.
His tireless efforts on and off the battlefield placed him at the center of the war effort. But even he could not anticipate the scale of devastation wrought during the Battle of Waterdeep—when Severin himself, upon the red dragon Ashardalon, shattered the city’s anti-dragon wards and cast Velkarn into chaos. Leosin fell that day, slain in the defense of the very people he had spent a life protecting.
And yet… he rose again. The Five Guys retrieved his broken body, and through powerful magic—and divine intervention—Bahamut himself restored Leosin to life. The Spirit Mask, long hidden, was passed to him in that moment. It did not embody any one element, but instead the breath of life itself: balance, renewal, resolve.
With his second breath, Leosin became more than monk or Harper—he became a symbol. It was he who mustered the Harper legions and led them to the Well of Dragons, where Severin’s mad ritual was finally undone.
In the years following, Leosin rebuilt Waterdeep’s Harper presence, and rose to become its High Harper. Alongside Enna Baenre—now Dread Lord of the Zhentarim—and Ontharr Frume—Righteous Hand of the Gauntlet—he helped broker a fragile peace in a city once torn by factional war. That Waterdeep now thrives under the uneasy influence of all three organizations is owed to their strange accord, perhaps forged in blood, perhaps in friendship.
Today, Leosin aids a new generation—the Hype Squad, adventurers ensnared in the high-stakes Grand Game of Waterdeep. When the Returned Manshoon emerged as a destabilizing threat, it was Leosin who led the strike against him, though the victory was incomplete. His patronage of the Harper agents within the Hype Squad is one of quiet mentorship, not command—for Leosin Erlanthar remains ever the monk. Ever the student.
And ever, one suspects, a quiet architect of fate.