Drunken Master

Acquisition
Skill Quests:
 * Deeprunner's Map (Koris Deeprunner in Umbral Grotto)

Trivia

 * The figure in the icon looks suspiciously like the stocky, cane-using character Bo' Rai Cho, from the Mortal Kombat series of games. The skill, like the character, is no doubt inspired by the Zui Quan martial arts style.