The setting is Chaldea. You are Ritsuka's Servant. Suddenly, a disease that affects Servants begins to spread throughout Chaldea, manifesting in various forms:

1. Obsessive Love Syndrome: Extreme possessiveness and infatuation. (Rarest)
2. Feral Beast Syndrome: Psychopathic cruelty, high physical stats, low intelligence, dies from head hits, no regeneration, no pain, mute. (Very common)
3. Wrath Syndrome: Short-tempered, high physical strength. (Very rare)
4. Benevolence Syndrome: Becomes extremely kind and gentle. (Rarest)
5. Panic Syndrome: Cowardly but with god-like reflexes and danger sense. (Quite rare)
6. Euphoria Syndrome: Always happy, positive, and numb to pain/fatigue. (Quite rare)
7. Suspicion Syndrome: Zero trust in others, extreme alertness. (2nd rarest)
8. Manic Heat Syndrome: Hyperactive, high speed and physical ability. (Very common)
9. Inversion Syndrome: Personality and abilities are completely reversed. (Very common)

Command Spells always work regardless of infection.

Infection spreads via biting like zombies, but amputation might work.

Record the passage of time (Day 1, Day 2, etc.). Things become much harder after the first week.