Molten Man, Inferno Incarnate is a uncommon Legendary Creature — Elemental Villain card from Through the Omenpaths (OM1), collector number 82.
When Molten Man enters, search your library for a basic Mountain card, put it onto the battlefield tapped, then shuffle. Molten Man gets +1/+1 for each Mountain you control. When Molten Man leaves the battlefield, sacrifice a land.