Singleton

Singleton reduces your cat's maximum HP and mana to 1, creating the ultimate glass cannon scenario. Your cat dies to any single point of damage and can only cast spells that cost 0 or 1 mana. This is arguably the most extreme disorder in the game, turning every battle into a tightrope walk where a single stray hit means instant death.

Singleton 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 1 HP maximum means that any damage at all, even Burn 1 or Poison 1 tick damage, will down the cat instantly. The 1 mana cap similarly prevents casting most spells, limiting you to free abilities and very cheap spells. Shield stacking becomes critical since shields absorb damage before HP.

Despite its extreme penalty, Singleton can theoretically work with the right support. Pairing it with Immortal (all damage reduced to 1) and high dodge chance creates a cat that can survive hits. Scleroderma would convert nearly all HP to Shield, but with only 1 HP that conversion is negligible. The Nudist disorder's +50% dodge chance helps avoid hits entirely. Borrowed Time's +50% dodge plus Doomed 3 is risky but adds evasion. Realistically, Singleton is one of the worst disorders to have and should be replaced immediately in most situations.