The Forgesmelter is an extremely rare Fire element Slug that can shoot lava from its mouth. It is the only Slug that can melt Smolten. One can be seen in Boss Ember's arsenal.
In protoform, they have block heads with blue bumps on top. It has a rust-red body wth a sandy-blue head, and on their back they have four glowing lava craters. They can melt metal off an object without damaging the contents. Eli Shane used a forgesmelter Slug in the episode Inheritance to melt smolten off of Will Shane's chest.
- Protoform Abilities - Can create a lot of heat for its small size, a tiny blast furnace.
- Metarupt - Lands and creates a small eruption of molten metal.
- Forgestrike - Can spit molten metal.
- Blastrap - Can solder together two pieces of steel, sealing doors, or melting a previous seal.
- Sealsmith - Creates a seal over a box or object, unbreakable except via another hit from the Forgesmelter.
- MagmaBlade: "Forgesmelter"+"Thresher" - Forms a superheated spinning saw blade that spews lava from its sides.
- Inheritance (First appearance)
- The Hard Part
- The Return
- Keys to the Kingdom
- The Lady and the Sword
- Slugterra: Into the Shadows