POISON: ULATHLASSS

A variety of osssra oil, the creations of yuan-ti spellcasters, osssra oils are mixtures of substances that produce pungent, colourful smoke when burned.

Yuan-ti typically immerse small pieces of firewood in osssra oil for 1D4 days and then burn them to create the smoke. A single vial of oil can treat enough wood to fill a 50-foot-square room with smoke for at least 4 hours. If ignited directly, the smoke fills the same area, but lasts for only 5 rounds. Once ignited by either method, osssra oil emits a cloudof coloured smoke that moves outward from itssource as a spread at the rate of 1 foot per round, to a maximum diameter of 60 feet. Osssra smoke is heavily scented, but it does not cause coughing, choking, or any other effect associated with tainted or insufficient air. The smoke has the same effect of a Fog Cloud spell (caster level 10th).

The secrets of making osssra oil is guarded by yuan-ti tribal elders, and most humans know too little about them to distinguish one oil from another. In some large cities or ports where there is little scrutiny from authorities, merchants often sell osssra oil as 'cooking oils' or 'scents'.

Varieties of osssra oil exist, and these varieties have their own qualities individual to them. Some confer benefits on all Scaled Ones but functions as an inhaled poison for all other creatures. In some cases direct contact with the oil in either ignited or unignited form is necessary to reeive the benefit. Varieties of osssra oil include: Amasstarte, Battasss, Duthlah'hass, Ektharisss, Faele, Hooloond, Jalasss, Laerisss, Ruusstantar, and Ulathlasss. Although some effects resemble those of spells, they are not magical effects. Thus, they can not be dispelled or prevented by spell resistance.

The dull, heavy, green smoke generated by this oil flows over floors and then up walls and furnishings as though it were a lazy serpent. Its smell is similar to that of roasting boar. Ulathasss oil is made from the internal juices of both carrion and crawlers and centipedes.

Ulathlasss smoke renders Scaled Ones immune to all effects related to examples of heat and cold (including natural torpor and natural or magical damage), but not the effects of natural or magical fire and ice, which deal half damage. This benefit lasts for as long as the Scaled One is in contact with the smoke and for 2D6 minutes thereafter.

Contact with ulathlasss oil has the same effects on reptiles as contact with the smoke, except that the user also becomes immune to damage from natural and magical fire and ice, and all benefits persist for 3D6 minutes after contact with the oil ceases. Ulathlasss confers no protection against lightning or any other electricity-based effects in any of its forms.

Successful Fortitude roll negates. Failure means initial effect is followed 1 minute later by secondary effect if another Fortitude save fails.

Based on entry in Forgotten Realms: Serpent Kingdoms P.151