> For the complete documentation index, see [llms.txt](https://box-best.gitbook.io/best-mystery-box/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://box-best.gitbook.io/best-mystery-box/english/for-players/common-problem/synthesis-failed.md).

# Synthesis failed

When synthesizing fragments or NFTs, there will be a probability that the synthesis will fail, and 1-2 synthesis materials will be lost after failure. Try to use the protection card to avoid the loss of synthesis, and use the diamond card to increase the success rate of synthesis.