Breacher Primus Route & Farming Guide

Breacher Primus is an Elite Enemy in Fontaine that drops Rift Core, Foreign Synapse, and Alien Life Core. As of version 4.0, these enemies are only available on the surface of Fontaine (and some of them in the underground Merusea Village of Fontaine).

In the route provided, you will meet 24 Breacher Primus. It’s a small number, but their drop rate is really high. Each of them is most likely confirmed to drop around 1-3 Cores of different rarity, but it is up to RNG whether you will gain lots or less. Based on my personal experience, you should be able to obtain around 130 Cores (of random rarity).

Notes: When creating this guide, the Genshin Impact Interactive Map is missing quite a few pins of Breacher Primus so I need to manually edit the image and add the missing ones.

Genshin Impact Interactive Map

Beryl Region (1-9 Breacher Primus)

North of Beryl Region (10-20 Breacher Primus)

Merusea Village (21-24 Breacher Primus)