Lego Club Magazine (July/August 2012) Monster Fighters: Challenge Lord Vampyre for the Powerful Moonstones!+Lego Star Wars+Lego Lord of the Rings+Ninjago+Hero Factory+much, much more!: Amazon.com: Books
FEB128097 - LEGO MONSTER FIGHTERS GHOST TRAIN SET - Previews World
BrickLink - Part 10178pb07 : LEGO Rock 1 x 2 Crystal Stepped with Minifigure Arm Digging through Black Dirt Moonstone Pattern [Rock] - BrickLink Reference Catalog