Moltenus is a giant Moltenore who was sealed inside Techo Mountain long ago, and kept hidden by the island elders. Tura-Kepek has twice succeeded in awakening him, and although Moltenus has been defeated, the lava inside the volcano heals him until whoever is controlling him is defeated.
The beast can be awoken using a collection of six magical wards, or by using the secret words, 'Ancient Beast of Magma Awaken'.