"Forcing this much mana in to a mana gem and core might not work." Walker was a bit skeptical as he looked at the rune covered red steel golem core. It was a unique material that had been taken from a melting iron golem. The steel aspect came after the golem had cooled and the properties of ores mixed and changed.
While the golem had not been at all a danger, this sort of event had led to a unique material that the wandering blacksmith had held on to for years without a project he wanted to use it on. There was rarely a metallic golem that was influenced by lava and had its core properties altered. Especially to be acclimated to fire mana rather than to purely earth mana.