Relics of the Saints
You enter the Undercity because that is where the saints go to die. Their relics are valuable, powerful, and can rub off on you.
First Class Relics are parts of the Saint's body and are the most valued. These are eaten by the faithful in an effort to become more like them. Eating a whole, undivided first class relic grants an immediate advance roll in a skill associated with the saint's interests.
Second Class Relics are tools of the Saints and have profound magical effects if used correctly.
Third class relics are any objects which have come into contact with the saint while they were alive, and often serve as clues to higher class relics. These generally have no obvious supranatural effect, but are thought of as good luck charms and are quite valuable.
Verification of relics by a licensed hagiographer is essential before subjecting them to veneration. They can tell you who it belonged to, how a 2nd clas relic is to be used most correctly and also confirm that a 1st class relic has not been shaved down or divided and thus rendered useless.
All relics (1st through 3rd) are detectable through Second Sight as Saintly and can be used in the same way as a Pocket God (destroyed or lost with use) without verification (as long as they are genuine and functional).
2nd class relics
In most cases, if the object is experimented with correctly the user can figure out what it does without resorting to an expensive hagiographer. However, if their experimentation goes wrong and they disassemble, divide, or otherwise interfere with a 2nd class relic in an incorrect, destructive way it loses its powers and is demoted to a 3rd class relic.
Cage of St Castulus the Blameless (Saint of Owl Catchers)
A small iron bird cage in which a piece of string suspends an ancient, verdigris stained, bone hanging where a bird might once have been. The door flaps loosely and has no way to secure it neatly.
If the cage is shaken in such a way as to cause the bone to clatter against the bars firmly and repeatedly, the shaker loses 1 Luck and counts as casting the Earthquake spell (no need to roll, no chance to learn).
Blindfold of St Jacinto (Saint of Competitive Eaters)
A torn off, grease-stained strip of cloth embroidered with tight, thick spirals. The pattern is obvious, to those who celebrate it, as being part of a traditional tablecloth used at the Season of the Snail festival.
The wearer may heal from any number of Provisions per day as long as they eat every meal while wearing the blindfold. If they eat any meal, even the normal 3, without it it won't work that day. The wearer will always be surprised if ambushed while eating. If they take the blindfold off while eating they lose any gained healing plus 2d6 more from violent vomiting.
Callinica's Ladder (Saint of Ass Dealers)
A rotten wooden ladder, only barely holding its rungs in place. Once painted dark green but now mostly flaked off and darkly stained at either end.
Anyone climbing this ladder, while it is firmly positioned and not in any way mobile, can carry an unlimited amount of weight up or down it and is unable to fall off. The ladder itself cannot be toppled, damaged or moved while being climbed, even by the one climbing it.