Requirements:
- New user
- A plain text link (cannot be text with a link embedded)
- This link stands alone on its own line
When the post is published:
- The link itself can satisfy the criteria for “First Link”
- An on-topic post can satisfy the criteria for “First Quote”
- A single line of plain text can correctly expand the OneBox block
Thus, a newly registered user who directly copies the URL of an on-topic post as their content can get 3 badges at once! 
Of course… this is just the scenario with minimal actions. They could also mention a user and add an emoji on the next line, then edit and flag the topic… resulting in something like this.
If the Show badge on the post it was granted for option is enabled for the relevant badges, you can get a piece of art like this. 
Of course, if there is collaboration from others, for example, when the quoted content indeed answers the question and the post is adopted as the solution, the artwork can become even more perfect.
Perhaps this is the fun of gamification. 