Final Fantasy Crystal Chronicles
n Final Fantasy Crystal Chronicles, the world is covered by a miasma poisonous to the four races: Selkies, Lilties, Clavats, and Yukes. Despite this, cities are located in several places, protected by magical crystals that fend off the miasma temporarily. In order to maintain the power of the crystals, each city recruits a crystal caravan. These caravans carry with them a "crystal chalice", a magical container with a shard of protective crystal attached. The caravans then travel around the world, seeking trees of the magical essence myrrh, which recharges the power of the crystals.
