411 REFERENCE · Wikibooks
EverQuest/uncommon Spells Tomes Discs/Koadic's Endless Intellect
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Koadic's Endless Intellect, more commonly referred to by the acronym KEI, or as C3 (since it is the third spell in the Clarity line) is a long-lasting mana regeneration buff, and can only be cast by enchanters.