Vocal Was Sogolon

Acquisition
Skill trainers
 * Tohn (Kamadan, Jewel of Istan)

Hero skill trainers
 * Libeh (Command Post)

Trivia

 * This skill is named after Sogolon the Protector, a Paragon and Sunspear Guard of Elona's Primeval Dynasty.
 * Another Sogolon is one of the henchmen available early in the Nightfall campaign.