An Artifact is a new item with its own equipment slot that can be used in addition to basic bat, hair, goggle, and accessory equipment.
Each Artifact grants the player with a base skill and an add-on skill.
The base skill for an Artifact is fixed to each Artifact. Add-on skills are randomly assigned from among the various skills in Homerun Clash.
You can upgrade the skill stats of your Artifact with the following methods.

Increase base skill: Level up Artifact
Add new skill or increase add-on skill: Upgrade Artifact

Dismantle other cards to obtain [ARTIFACT EXP] that can be used to level up your Artifact.