The Thazvaar Heatthorn is a hardy desert succulent found throughout Inland Thazvaar. Its dense, thorn-covered surface absorbs and stores solar heat, allowing the spines to retain blistering temperatures. Darker subspecies can reach internal heat levels exceeding 340°C, making them dangerous to touch but occasionally useful in emergencies.
Travelers and stranded contractors have used Heatthorn clusters to cook food or boil water when no fire sources were available. In rare cases, the heat output has been harnessed to charge portable devices through improvised geothermal converters. Despite its potential, the Heatthorn remains a last-resort resource.