Mutilation

Heavy hits to an entity that has a bleed damage attribute above 0 start bleeding, and bleeding drains health over time, faster while sprinting. A bleed can close by itself only when it is light; heavy bleeding stays until healing is applied. Healing goes to the bleed first and only then to the critical timer. Health falling to 0 can also lower certain attributes, such as movement and attack speed, by amounts set in the config.

When an entity dies while bleeding, it does not die at once. It enters a critical state with a timer, 20 seconds by default. Taking damage in that state costs time, and healing adds time back. If the entity survives 25 seconds by default, it recovers, followed by a 2-minute cooldown in which the next death at 0 health is final. The mod is client and server, so the server and every player need it. Files are published for NeoForge 1.21.1 only, with 1.0 as the latest file, and the code is released under the MIT License as open source.