Hephaestus

Hephaestus, the Denizen of the Land of Heat and Clockwork, lord of the Forge.

In Greek myth, Hephaestus lived in a volcano, and was the God of blacksmithing. In the timeline of both Alpha Dave and Alternate Future Dave, Hephaestus became enraged when Dave broke Caledfwlch, and even more enraged when it became apparent that Jade wouldn't be entering the Medium, as he desired access to her Volcano, the Kids' session's Forge, to repair Caledfwlch. Alternate Future Dave obtained the captcha code for his hammer through "shenanigans". He then gave it to John, who made Fear No Anvil with it.