The dirtiest block is an object that summons the dirtiest block to the pet. It looks identical to a normal Ground and follows the player.
It can be extremely rarely found in the world instead of the usual blocks of earth. During the generation of the world, 3 (small world), 6 (medium world) or 9 (big world) blocks of earth will be replaced with earthen earth.

Check the settings:


From spawn 7 trees to the left

Before this tree:



And near the tree we dig the ground, approximately in this place:



And we get the dirtiest block:



Video to help:
https://youtu.be/4eiCoeKoCtg

Original manual: https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3013916120
Also if you want. you can reward the management: