Lava Release Kekkei Genkai is a nature transformation Kekkei Genkai, created from combining fire release, with earth release.
Several characters have been able to use Lava Release in Naruto.
Here’s a list of all 7 Lava Release users in Naruto.
Kurotsuchi is the granddaughter of the Third Tsuchikage, Onoki. She is able to combine fire release with earth release to create Lava Release. In her case, the Lava Release takes the form of quicklime, which is a corrosive substance. Furthermore, she can use it in conjunction with water release, and increase its range. Kurotsuchi can also use her Kekkei Genkai as ashes.
Rōshi was the Jinchuuriki of Son Gokū, the 4 Tails. Being the Jinchuuriki of Son Gokū gave him the power to use Lava Release. His Lava Release takes the form of molten rocks. Rōshi was also able to use the Lava Release Chakra Mode, which covered his entire body in lava. This could be used both defensively, and offensively.