Erimem's signet ring

Erimem wore a signet ring with the sigil of a lioness, the symbol of the Osiran, Sekhmet. The ring contained a capsule of distilled mandrake root.

When the Fifth Doctor and Erimem crash landed on Peladon on an Ice Warrior spaceship, the Doctor was able to hypnotise an attacking Aggedor with the ring. Later, as she offered her blood to Sekhmet to supposedly release her from her blood locks, Erimem kissed her ring, ingesting the mandrake root contained in her ring to poison the blood before letting it out. This caused Sekhmet to be poisoned as well. Erimem was saved by a "very crude" transfusion of the Doctor's blood. (AUDIO: The Bride of Peladon)