> For the complete documentation index, see [llms.txt](https://tribalisland.gitbook.io/tribalisland-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tribalisland.gitbook.io/tribalisland-whitepaper/overview/getting-started/breeding-cave.md).

# Breeding Cave

### • **Reproduction**

In the breeding cave, gamers can select parent battle pets to generate pet eggs according to the attributes of the parent battle pets randomly. When putting the pet eggs into the hatching nest, you can generate corresponding pets successfully. It is worth reminding that breeding has a cooldown, and only pets that are not on a cooldown can breed.

### • **Breeding rules**

The pet eggs are randomly generated according to the attributes of the parent battle pets. For example, if the father has the attribute of “earth” and the mother has the attribute of “fire”, three types of battle pets may be generated: the attribute of “earth”, the attribute of “fire”, and the attribute of “earth+fire”. One special point is that opposing attributes cannot be bred when breeding. For example, the attribute of “fire” and the attribute of “forest” cannot be bred.

The breeding process takes a certain amount of time, and the amount of time is determined by the battle pet itself. If the gamer would like to shorten the breeding time, the gamer could choose to spend “energy crystals” to complete the breeding process immediately.

### • **Breeding type**

Breeding types are divided into “Ordinary Breeding” and “Time-Limited Breeding”. Time-limited pets can only be obtained by breeding within the limited activity time.

### • **Breeding cave upgrade**

Once the level of the breeding cave is upgraded, gamer can breed more rare pets. The level cap of breeding caves is 6. Gamers can own another breeding caves by purchases.


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