The Molten Upgrader is an easter egg item. Originally an upgrade kit, it was functionally removed from the mod in 3.2. Its only use is in a chain of item conversions that results in the Experiment W-801.
Like most other easter egg items, Molten Upgraders do not appear in the creative inventory. They are also unobtainable through /give, as they are instantly deleted when obtained in this manner.
Molten Upgraders are only obtained when the player hits a mob with a Millennium Upgrader while both are simultaneously in lava.
When dropped during a full moon, the molten upgrader will change into a moonstone.
- Prior to being made into an easter egg item, the Molten Upgrader was an upgrade kit used only to upgrade the Hot Shot into the Heat Wave. In 3.2, the Nether Upgrade Kit assumed the role instead.