In remote and distant fields grow an herb called raskovnik, or thief's clover. It grows in close proximity with other herbs, and an untrained eye could pass over a specimen a hundred times without ever espying it. The herb can be found with some difficulty by druids, yielding at best 1 quatrefoil per hour. Tortoises and snakes are quite capable of finding it, and will be able to direct a character to a clump of 1-6 quatrefoils per hour. This never reaches more than 10 quatrefoils found in a given field in a month.
When the stem of a raskovnik plant is placed in a lock for 1 turn, the lock will be opened (it is permanently broken). This applies to all non-magical locks, regardless of complexity. Inserting a raskovnik stem into a trapped lock will trigger the trap on a roll of 1-2 in 1d6. A Wizard Locked door can only be opened by a number of raskovnik quatrefoils equal to the level of the magic-user who cast the spell. Other magical locks are similarly effected.
A tea can be brewed from at least six raskovnik plants in eight ounces of water. This must be steeped for at least 4 hours to gain the desired effect, and the plants so brewed lose their lock-opening powers. The remaining tea is strongly concentrated and, if drunk, will grant the ability to detect the largest treasure within 120' of the imbiber for 2-12 turns.
Rodents have an insatiable appetite for raskovnik. Hedgehogs, giant rats and other rodent-like creatures within 60' of a raskovnik plant (living or cut) can smell it and will seek to devour it immediately, ignoring anything that comes between itself and the plant.