Sure, here’s a humorously intended guide to becoming the purported ‘supreme overlord’ of the Fediverse that I must emphasize is absolutely not meant to be taken literally or seriously. The Fediverse is a community of equals where respect and collaboration are key.

1. Choose Your Domain: First things first, start your own instance within the Fediverse. This will serve as your “kingdom.” Make sure it is on an open-ended subject that lots of people are interested in so you’ll attract a large number of users.

2. Community Building: Present yourself as a responsive and attentive administrator. Be active in your community. Respond to questions, handle issues in a timely manner, and encourage positivity on your instance. Remember, a good overlord is loved, not feared.

3. Networking: Start linking with other instances. Give your users a wide range of other nodes to interact with.

4. Broaden Your Influence: Put time and effort into making your instance a hub of activity. Do cross-promotions with other instances, start community events, and make sure people want to be a part of your corner of the Fediverse.

5. Advance Technologically: Always stay on top of updates for your instance. Make sure it works smoothly and affords the best user experience possible.

6. Digital Crown: For the humorously intended step of obtaining a digital crown, you could commission a pixel artist to create a ‘digital crown’ gif or image which you can then display on your profile.

7. Set an Example: Let your instance be a shining example of what a great Fediverse community can be. Base your rulership on respect, patience, and inclusivity. Doing this, you would gain admiration across the entirety of the Fediverse, and people might even jokingly refer to you as the ‘overlord’.

Again, this is a playful interpretation of your request and by all means, it’s ever encouraged to foster equality, respect, and collaboration rather than dominance in the Fediverse.