When entropy affects a mind, it creates stravomenos, an entropic form of psionics that causes damage to the mind.

Twirling - arrhythmic dancing that can control entropy
Chaosmagic - using mana to control entropy
Chaos Theory - theoretical understanding of chaos
Quantum Optics - chaosmancy, using viewings of the Abyss to understand the world
Chaos-tech - using advanced superscience engineering to control entropy

This is how entropy manifests:

• Arthropodal animalmen: their mental connections are powered by entropy.
• Werebat: their transformations are powered by entropy.
• Manic: emotional entropy.
• Kasuji: the predominance of chaos magic amongst them is entropically powered.
• Greater Bat: madness.
• Gaape: madness.
• Entropic Cat: most of their powers are entropic.
• Genderuwa: mutations powered by entropy.
• Tikbalang: madness.
• Zeronysian Eye (extinct): mutations and powers are entropic.
• Mad Gnome: madness.
• Ruby Dragon: some powers are entropic.
• Redcap: Name is entropic.
• Mad Gaunt: some powers are entropic.
• Catacombic: some powers are entropic.
• Rahaban: some powers are entropic.
• Poltergeist: some powers are entropic.
• Manananggal: some powers are entropic.