Thoqqua

Thoqquas are unusual creatures, more elemental entity composed of raw earth and flame than normal living creature. Thoqquas are incredibly sensitive to invasion into what they perceive as their territory, and will seek out and remove such threats with flame.

In addition to their overly sensitive nature, thoqquas are dangerous even with their mere presence: thoqquas burrow through all but the densest of materials, transforming stone into magma with but a touch of the incredibly intense cone of flame that serves as their head. While this transmogrified lava will eventually revert back to its original form, while it transitions it becomes a form of stone known as "magma rock," which radiates intense heat and can release the lava trapped in its core if disturbed.

Origin

Thoqquas are a more obscure monster from Dungeons & Dragons.