# Fusion

Players can fuse their pets into a new pet with a different rarity level, thus fusion is one of the most important mechanics of the Pethereum metaverse. When two pets enter the fusion chamber, a new pet emerges and inherits the physical traits of parent pets but the parent pets disappear forever. Since all pets have a rarity level based on their physical traits, the result of the fusion can be a pet with better stats or lesser stats. This result is solely based on the physical traits of parent pets because a new physical trait cannot be generated with the fusion.

![](https://1792983311-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhKWoL8qL721MDU4iTZdQ%2Fuploads%2FgKbENR3JK6t1kFc90sOy%2FPETH_lab_beyaz.png?alt=media\&token=69ae6ef3-e7e8-44b7-bbc5-461b1f436a38)

Calculation of fusion’s chances is simple since all the physical traits (hair, ear, eye, mouth, tail, feet, color, second color, body shape, pattern) have a rarity level and this rarity level will determine the result of the fusion. The dominance of a physical trait is based on the rarity level of the two fused parts. You can see fusion calculation below.

<figure><img src="https://1792983311-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhKWoL8qL721MDU4iTZdQ%2Fuploads%2F9uNA4zxn7xVPxKSR7dEk%2Fimage.png?alt=media&#x26;token=82117850-46a8-4e52-8209-64899db02088" alt=""><figcaption></figcaption></figure>