Underrail Biology

Apply lethal toxins (like Cave Ear or Crawler Poison) to knives and crossbow bolts.

If you want to make infused leather armor (using Siphoner or Rathound skins), you’ll need Biology to "tame" the organic material and Tailoring to stitch it together.

This is a reference to , the turn-based isometric indie RPG set in a vast, post-apocalyptic underground metro system. In the game, Biology is one of the four crafting skills (alongside Chemistry, Electronics, and Mechanics), and it focuses on living organisms.

Another fascinating creature is the ( Araneus subterraneus ), a massive, blind spider that has evolved to thrive in the Underrail. Its elongated body and powerful legs enable it to navigate narrow crevices and corners, while its sensitive pedipalps detect vibrations and chemical cues.

If you are running a or a Thief build, Biology is your primary offensive tool.

Here is a concise breakdown of :

Biology in Underrail is the art of turning a hostile environment into a personal pharmacy and armory. Whether you are stitching together a suit of regenerative leather or brewing a cocktail of stimulants to take down a Dreadnought, Biology ensures that you remain the apex predator of the tunnels.

Don't leave those Rathound hearts or Siphoner skins behind. Even if you don't use them now, they are the "ore" of the Biology skill.

Crafting specialized vials for the Chemical Pistol requires a mix of Chemistry and Biology.