I used the x potion but all it did was rename me Player-346 temporarily. What does that mean?

The recipe is:

* 1 empty potion
* 1 poison potion
* 1 confusion potion
* 1 invisibility potion
* 1 instant countdown potion
* 1 suicide potion
* 1 cookie potion
* 100000 gold bars
* 100000 iron bars