Enchanter Graphic Novel Volume 02 (Mature)

"Eukanaria and Haruhiko are hot on the trail of the elusive Demon-Stones in an all out treasure hunt. When digging for buried treasure, you have to have the right atmosphere and the Crystal Cave seems like the ideal spot. But buried treasure, by definition, has to be protected by traps and treachery. So when the stones walls in the cave begin to move, it's a sure sign that they are in the right spot."