Two-headed Dragons are those whose bodies are composed of two separate heads and necks (and therefore two separate consciousnesses) that share one main body, one tail, and one set of limbs. The degree to which the consciousnesses are integrated varies depending on the breed. Two-headed dragons can only breed with other Two-Headed dragons (regardless of what other sub-type(s) they may be, such as the Two-headed Lindwurm), and their eggs cannot be bitten by Vampire Dragons.
On August 20, 2017, a site update was done that involved new descriptive text for this morphology type being added into the cave. This text was added in addition to what regular dragons include on their pages, describing what dragons are in the context of the Dragon Cave world, with this next text being added after this standard description.