From LSWiki

Class: Esoteric Skills
Attribute: Willpower
Pedagogy: Procedural
Practitioner Term: Channeler

The ability to open oneself to the naturally occurring flows of spiritual energy in one's environment and allow these to replenish one's own spiritual reserves.

Trainers

Trainers: 
Nexus: Goth
R'lyeh : Ithnagl wanders
Shadow Tower: Gaerie
Temple of Discordia: Erasmus
Veteran: wanders
Association required:
Agnihotri: Riga
Deep Ones: Dagon
Deep Ones: Mother Hydra
Losthaven Guard: Berek
Ollin Tonatiuh: Nezcaluca
Ygellethites: Ashyire
Ygellethites: Saruezzta
Guild required:
Aligned: Taiji
Coven: Esme Wanders
Coven: Halea
Coven: Lynda Xenetha
Devonshire Clerics: Thromdan
Elflords: Celeborn
Ordo Ignis Aeternis: Flizera
Ordo Ignis Aeternis: Pierce
Ordo Maleficus: Antonina
Ordo Zephyrius Mutatoris: Aerina
Ringwielders: Merethus
Temple of Discordia: Malaclypse the Younger LDDPOEE
Zetesai: Linp
Quest required