Terpene synthase that may be involved in the production of volatile terpenoids (PubMed:31839833). Does not show detectable terpene products with either farnesyl diphosphate (FPP) or geranyl diphosphate (GPP) (PubMed:31839833). P.polycephalum has a unique biology and these volatile terpenoids could function in internal communication of P.polycephalum, to mark the territory that have been explored, or they may be involved in chemotaxis (Probable). The 2 conserved active-site motifs D(D/E)XX(D/E) and NSE are required for coordinating the divalent metal ions that stabilize the PPi moiety of the substrate. The C-terminal WxxxxxRY motif is frequently found in terpene synthases and is important to guide product formation. Belongs to the terpene synthase family.