Darwinism

The potion effect works in three tiers, each stronger than the last, and a harder brew pushes the body further past normal human limits. Sprinting for long enough speeds the player up, taking damage starts a regeneration effect that strengthens itself the more the player keeps getting hurt, and stepping into darkness lets the eyes adjust. The mod runs on Forge and NeoForge and is published for 1.20.1 – 1.21.8, with files for 1.20.1, 1.21.1 and 1.21.8; it needs both the server and every player, and the code is open source under the GNU General Public License v3.0 or later. Darwin's Serum is required, since it adapts environment actions into the effects that let the body survive.