The word myself is a reflexive pronoun, and it does not have a plural form. Reflexive pronouns are used to refer back to the subject of a sentence, and they always remain singular.
To express the same idea in the plural, you would use the appropriate plural pronoun for the subject of the sentence.
For example, instead of saying "We saw ourselves in the mirror," you would say:
- We saw ourselves in the mirror.
Here, ourselves is the plural reflexive pronoun that refers back to the plural subject we.