Degeneration is a Guild skill, found in the Mages Guild Skill line. Great offensive skill that also boosts Damage.

Degeneration
2430 Instant Cast Target: Enemy Base Skill: Entropy
Bind an enemy with chaotic magic, dealing 4642 Magic Damage over 20 seconds. Excess magic spills out from them, granting you Major Brutality and Sorcery, increasing your Weapon and Spell Damage by 20% for 20 seconds.

Degeneration is a morph of the Entropy base skill. The other morph is Structured Entropy.