Differences with Pauper Commander?

When Pauper Commander was first created, there were very few uncommon legendary creatures available (around 22 at the time).
To address this limitation, the rule was relaxed to allow any uncommon creature to serve as a commander, even though this violated the core philosophy of the Commander format. However, this compromise was necessary at the time.

Now, years later, the situation has changed significantly.
With the release of many new sets, there are now over 300 uncommon legendary creatures, providing ample choice without needing to deviate from the original spirit of the format.

For this reason, the “Legendary Pauper Commander” format is introduced.
This variant modifies only one rule: the commander must be an uncommon legendary creature. All other rules of Pauper Commander remain unchanged, restoring alignment with the traditional Commander philosophy.