Lost Legacy: The Qualities of an Adventurer (2014)

User summary:

This expansion, of unknown compatibility with all Lost Legacy sets, was first handed out as a promo sheet on Tokyo Game Market spring 2014. Unlike the other promo sheets, this is not a separate set, but a set of 8 special ability cards that are possible to use with any Lost Legacy set and that gives the player a special ability throughout the game.

The promo status of this expansion was primarily because it wasn't fully tested and the designer was not sure it wouldn't completely break certain sets or combinations of sets.