3e SRD:Alchemist's Fire
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Alchemist's fire is a sticky, adhesive substance that ignites when exposed to air. Throw a flask of alchemist's fire as a grenadelike weapon.
On the round following a direct hit, the target takes an additional 1d6 points of damage. The target can take a full-round action to attempt to extinguish the flames before taking this additional damage. It takes a successful Reflex saving throw (DC 15) to extinguish the flames. Rolling on the ground allows the character a +2 bonus. Leaping into a lake or magically extinguishing the flames automatically smothers the flames.