Level 9 DiseaseEcho Madness

This mental illness, brought on by the endless echoes of the Howling Warrens, slowly drives its victims insane, compelling them to remain within the Warrens.

Stage 0: The target recovers from the disease.
Stage 1: Initial Effect: The target takes a -2 penalty to Will and to all skill checks.
Stage 2: The target gains the normal benefits of an extended rest, but only while taken within the Howling Warrens.
Stage 3: Final State: The penalty to Will and to all skill checks is eliminated. The target cannot gain the benefits of any rest except while in the Howling Warrens.
Check: At the end of each extended rest, the target makes an Endurance check if it is at stage 1 or 2.
14 or lower: The stage of the disease increases by one.
15-19: No Change
20 or higher: The stage of the disease decreases by one.

Published in Underdark, page(s) 46.