Soul Debt tracks how many Soul Fragments are tied to your player. By default, this amount is 0. It can be positive or negative:

• Soul Surplus means you have absorbed more Soul Fragments than you have removed.
• Soul Debt means you have removed more Soul Fragments than you have absorbed.

Each point changes your maximum health by the server's Health per Soul Fragment config value. By default this is 2 health, or one heart.

Soul Fragments

Soul Fragments are rare drops from entities. The base drop chance is about 1 in 43 million. Killing with the Kikoku adds a separate bonus roll with about a 1 in 4.3 million chance.

Using a Soul Fragment absorbs it and increases your Soul Surplus by 1. With the default config, that adds one heart to your maximum health.

The Soul Fragment's tooltip shows your current Soul Debt or Soul Surplus and the current max-health modifier from the system.

Removing Fragments

Use an Etheric Sword to remove one Soul Fragment from yourself. If successful, you receive a Soul Fragment item and your stored total decreases by 1.

The sword will not remove a fragment if doing so would make your maximum health drop to 0 or below.

Death Behavior

The Server config controls what happens to Soul Debt and Soul Surplus when you die: