This quest is not available in game.
Obtain a Cantation of Manifestation and a Chest of Containment Coffers from behind Anastasia Hartwell. Bring 3 Filled Containment Coffers, the Chest of Containment Coffers and the Cantation of Manifestation to Anastasia in the Undercity.
Algernon's alchemist shop in the Apothecarium is the locus of a strange disturbance. Invisible creatures, made solely of magic, wander the shop--there must be a reason, and we must find it!
Investigate the disturbance and capture those creatures. Take a chest of coffers and a scroll from behind me. Use the scroll at the shop to make the creatures visible, subdue them with your spells, then throw down a coffer to capture them. Return with the filled coffers, the empty coffers and the cantation.