Arm of Prometheus
Even with the protection afforded by the highest levels of Fortitude, some sources of damage cannot be resisted. With this power, a vampire may temporarily make one of her limbs immune to any and all sources of damage. It is believed that Lazarus of Clan Cappadocian first discovered this power and that it is needed in order to perform a mighty Mortis ritual, where the caster must hold an ingredient in a roaring fire for an hour.
System: The player spends 3 blood points and designates one of her character’s arms or legs. The character spends a turn in concentration. For the next 10 minutes, the chosen limb is entirely indestructible. Fire, sunlight, the bite of a mighty Lupine, a wizard’s most powerful magics — nothing affects it (though any armor or clothing may still be damaged). Spending another 3 blood points when the time is up extends the duration of Arm of Prometheus. The supernatural hardness of the limb also allows it to be used as a weapon — a punch with such a limb inflicts Strength +1 lethal damage, a kick inflicts Strength +2.