Artifacts and Modifiers

Artifacts give you passive bonuses that help you fight better and get more resources. They're stored in an Artifact Vault, and each artifact takes up 1 slot. You'll get 1 Artifact Vault with 1 slot automatically when you start a run. Upgrade the vault and build new ones to hold more artifacts.

Modifiers are upgrades for modules (they'll tell you which module they affect in their description). They're stored in the corresponding module, and give powerful passive bonuses just like artifacts do.

Look for modifiers and artifacts in the shop and in map events.