The hammer can also be used for regular smithing and will not disappear. However the hammer may not be used to smith together godsword shards to make a blade (this is likely an oversight by Jagex). The hammer also has different appearance while smithing to a regular hammer, with a closer appearance to a chisel on the top half, and a regular hammer on the bottom. Despite this, it cannot be used to cut gems. The Blast fusion hammer can only be bought after completion of the Grandmaster quest, While Guthix Sleeps.