Insomnia

Insomnia prevents your cat from falling asleep under any circumstances. This may sound purely beneficial, but sleep in Mewgenics serves multiple purposes: sleeping cats regenerate HP and mana, and certain abilities or items interact with the sleep state. By making your cat immune to sleep, you lose access to these healing and mana recovery opportunities, but you also become immune to enemy sleep-inducing attacks.

Insomnia is heritable and can pass from parent to kitten through breeding. It can also be acquired through events or applied with a Disorder Syringe from the Organ Grinder. The disorder directly counters sleep-based threats including Narcolepsy (which forces sleep at end of turn) and Hypersomnia (which starts battles asleep). If paired with Sleep Paralysis, Insomnia would prevent the paralysis demon from ever spawning since the cat cannot fall asleep.

Strategically, Insomnia is a situational disorder. In fights against enemies that use sleep attacks, it provides complete immunity to a dangerous crowd control effect. Against enemies that do not use sleep, it is a mild negative since you lose the option to voluntarily sleep for regeneration. It pairs best with builds that have alternative healing sources and do not rely on sleep-based mana recovery. If you find your runs frequently involve sleep-heavy enemy encounters, Insomnia can be a valuable defensive tool.