Veil of Thanos
The Veil of Thanos is a strip of dusty-grey cloth made of a sheer fabric, usually appearing to be very aged, threadbare, and tattered. For it to have any effect, it must be worn as a blindfold. Upon doing so, the bearer is able to see those who have been touched by death– the exact thematics vary from user to user, but most often those stricken with disease appear as skeletons, necromancers have a certain distinctive pallor about them, and murderers appear monstrous– the more kills, the worse they seem.
Mechanics-wise, it requires a Knowledge (religion) check to work. DC 5 reveals undead and spirits, and beings who are in the advanced stages of an undeath-related infection such as ghoul fever. DC 10 shows beings in the earlier stages of an infection. DC 15 reveals necromancers (here interpreted as “those who can control undead,” this includes Clerics who use Rebuke Undead.) DC 25 reveals even the slightest taints of death, usually those who have engaged in willful murder.
The creation of a Veil is a lengthy process, as the strip of cloth must first be buried in the earth of a gravesite for a month, then dug up and consecrated by a Cleric on the spot. These Veils are highly important to traveling Carrion Birds in their battles against the forces of Evil death cults, and thus are considered sacred items to be treated with great care.