Hey there, looks like you started it on your Hunter. Only one character gets the 'Destined Heroes' exotic quest, which includes Lost in the Light and Found in the Dark. Your Hunter played up to The Hollow II but doesn't look to have played Queens II. Could you check your Hunter's quest log? Alt characters can play the six sub-missions that made this questline up, from banner staves around the Lost Tower - Home I & II, The Hollow I & II, Queens I & II. Each has a prismatic unlock as a completion reward. Note that until your Hunter completes Queens II, that mission CAN be launched by Warlock and Titan but they will not earn the Prismatic reward, the Strand melee.