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