Phantom Blade Zero 66-Day Countdown: Known vs Unknown

The protagonist Soul is framed for killing the order's leader and, after being implanted with the "corroded heart", has only 66 days to live. This page separates what is known from what is unknown about this death countdown; anything the official hasn't stated is marked VERIFY.

🩸 The 66-day rule: known vs unknown

Time remaining66 days to live (OFFICIAL, Steam/Wikipedia text)
1 death = 1 dayEach death costs 1 day (IGN preview conclusion, consistent across media previews)
Enemies don't respawn after deathEnemies do not respawn after death, unlike a soulslike bonfire reset
Can days be restored?Not stated by the official (VERIFY, IGN itself says "unclear")
What happens when the 66 days run outNot word-for-word stated by the official (VERIFY)

Source: IGN preview, Wikipedia, Steam.

Death penalty & save points

Each death costs 1 day (66-day countdown); enemies don't respawn after death (unlike a soulslike bonfire).

A bell = save/fast-travel point (IGN calls it bonfire-like).

3 difficulty tiers (OFFICIAL)

Wayfarer (traveler): enjoy the story.

Hellwalker: stronger, more adaptive enemy AI.

Sixty-Six Days: the hardest.

Source: PlayStation.Blog SoP.