Fathomlethes are tiny pearls, described to look like blue-green caviar, which can be found in rare river oysters. They are kept in a bottle and removed with tiny tongs. As mentioned in Neverseen, once one is consumed, it takes about 15 minutes to put the user to sleep.
Official Description[]
These tiny pearls (harvested from rare river oysters) can trigger vivid, overwhelming dreams when ingested - which makes taking fathomlethes both a risky and useful tool to access long-term memories.
History[]
Book 4: Neverseen[]
Keefe ate one to help him try to find clues in his memories of Lady Gisela's plans and hints of her being in the Neverseen.
Book 7: Flashback[]
Keefe tried to convince Elwin and Tiergan to give him some so he could recover more memories. However, Elwin refused.
Book 8: Legacy[]
Keefe admitted that he used a fathomlethe to recover a memory about who he gave a message to from Lady Gisela.
Use[]
“Fathomlethes are overwhelming at best and unreliable at worst—and an incredibly poor substitute for proper telepathic exercises. They’re what some rely on when they don’t have access to the tremendous resources that you have.”
Known Users[]