> For the complete documentation index, see [llms.txt](https://theia001.gitbook.io/spaceship/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://theia001.gitbook.io/spaceship/spaceship-factory/spacecraft-synthesis.md).

# Spaceship Synthesis

1. Any two low-level material spaceships of the same level can be combined into a high-level target spaceship.  Grade-S and Grade-A Spaceships cannot be used as material spaceships, and  Grade-S Spaceships cannot be used as target Spaceships.
2. In addition to two low-level spaceships of the same level, synthetic Spaceships also need to consume ENG and TIA tokens. The number of tokens consumed by designated or randomly synthesized target Spaceships is also inconsistent.

Take Theia on BSC as an example, and refer to DAPP display for details：

| Type | Random target ship | Designated target ship |
| ---- | ------------------ | ---------------------- |
|      | Fee (TIA/ENG)      | Fee (TIA/ENG)          |
| D→C  | 20/1               | 40/2                   |
| C→B  | 40/2               | 80/4                   |
| B→A  | 80/4               | 160/8                  |

3.The success rate of synthetic spaceship is 100%

4.After the synthetic spaceship succeeds, the material spaceship will be destroyed, but the ENG token reward cannot be obtained.

5.After the synthetic spaceship obtains the new spacecraft, it will obtain the Pioneer Token to compete for the "spacecraft pioneer".


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