Karnala is the Urge Wyrm of Desire.
Karnala is raw untamed desire. It can attach itself to any goal; just when victims achieve one goal, they swiftly discover a new, equally pressing desire they must fulfill. Karnala creates and feeds upon yearning, not attainment. It also blinds a victim to anything beyond his desires, including any long-term consequences, which could cause him to lose everything he has gained.
Karnala is far more about having experiences rather than accumulation of things, and as such differs from Vorus. Few in the thrall of Vorus gamble unless they are almost certain they will win, because losing deprives them of some of their accumulated money or goods. Gamblers in the thrall of Karnala gain the thrill of risking everything even if they lose the bet.