The weapon costs 499z to make and requires the following materials: Chrome Voucher x5, Machalite Ore x5, Iron Ore x35, Unknown Skull x1. This Great Sword was obtainable by completing an Event Quest called 'The GMR Heavy Metal Crusade' which first appeared on October 24, 2004. The GMR Chrome Heart is the first ever collaboration in the Monster Hunter franchise. Its first issue debuted on February 2003 and the last issue ended in 2005. GMR was a monthly magazine that is no longer in print.
3.1 Capcom USA and Logitech Collaboration.