You mean when warlock fears were 2030 sec and had no diminishing returns even in PvP , the good ol ' days . <| sep |> I have this because I just started on meds <| sep |> Age is the biggest problem . Denna is only a few years older than Kvothe and Meluan is much older . Old enough to be of age with the Maer . It was the older Lackless sister than ran off so for Denna to be the missing Lackless sister , she would have to be older than Meluan . This age discrepancy can certainly be overcome with a trip to fae for Denna . Personally I think Denna is a Lackkey and simply bears a family resemblance because the Lackless family and the Lackkey family were one family . Denna and Kvothe pose as cousins in Trebon . This is ironic if she is a lackkey and Kvothe a Lackless . Kvothe ' s mother being the missing sister than ran off with the Ruh troupe . Denna , the world ' s leading expert in yllish knots , will be the one to open the box . The box contains a stone which is probably the key to the doors of stone behind which the enemy was set at Drossen Tor . Denna ' s ring is probably the key to the box . uxland 44 posted a great theory about how the Lackless box is locked . The true magic behind the knots and the key to the Lackless box . uxland 44 proposed that the yllish knot on the box simply says lock on it and to open it one needs to add the Yllish for the word less . There is a wonderful reflection of the Lockless family breakup expressed as pieces to the puzzle of the Box . Lockless family split apart and the Lockless box became locked . It is in the possession of the Lackless family . The Lackless family lacks the less part of the family heirloom hence the name . Lack less . The Lackless fl family heirloom is Denna ' s ring . It contains the Yllish for less . Hold the box while wearing the ring and the box can be opened . The lackkey family either has the key to the Lockless family or they lack the key to the doors of stone which is locked inside the box .