Variable Level DiseaseCorporeal Instability

A creature afflicted by this disease undergoes a rapid transformation to become a boiling, writhing mass of melting flesh.

Stage 0: The target recovers from the disease.
Stage 1: While affected by stage 1, the target is slowed.
Stage 2: While affected by stage 2, the target is dazed and slowed.
Stage 3: The target is no longer dazed or slowed. It regains all lost hit points and becomes a chaos beast under the DM’s control. As a chaos beast, it gains the corporeal instability power.
Check: At the end of each extended rest, the target makes an Endurance check if it is at stage 1 or 2.
Lower than Easy DC: The stage of the disease increases by one.
Easy DC: No Change
Moderate DC: The stage of the disease decreases by one.

Published in The Book of Vile Darkness, page(s) 2-48.