Key quests

K
Classic Kunark
 * Key to Paineel
 * Plane of Sky
 * Key to Charasis (Howling Stones)
 * Key to Old Sebilis
 * Key to Veeshan's Peak

Velious

 * Tower of Frozen Shadow
 * Skyshrine Key
 * Sleeper's Tomb

Luclin

 * Key to the Emperor's Chamber
 * Key to Vex Thal