No . I mean a Mystery box that gives you an Elemental Lapis. you Just dont know which one you will get.
Would for sure destroy the value of ele lapis for a while, unless they were priced at like 10K AP each (at which point few would buy them unless it were coupled with a GM link tiered event and the purchase qualified).
Maybe flooding the market with things like ele lapis and other highly desirable things might be a way to bring some sense back to the in-game economy though.
Give everyone one each for weapon and armour for each toon at an unannounced point in time, modified for a 100% link chance, and there'd be hardly anyone buying or selling them any longer.
Do the same with some other things and you'd destroy the market semi-permanently.