Magikarp's heirloom is a piece of equipment, and its specific functions are as follows:

1. heirloom is account-bound and can be used to equip trumpet. Including shoulders, clothes (these two are experience), weapons and accessories. After buying it, you can mail it to your own trumpet, and you can wear it from 1 level.

I hope the above information can help you solve the problem. Please feel free to let me know if you have any other questions.