In the rich text editor:
@CryptidCreature
In a comment:
[CryptidCreature](https://chowlings.com/user/CryptidCreature)
For Names and Avatars:
In the rich text editor:
%CryptidCreature
In a comment:
[](https://chowlings.com/user/CryptidCreature) [CryptidCreature](https://chowlings.com/user/CryptidCreature)