Elden Ring Shadow of the Erdtree — how to complete the expansion (main bosses)

The “Shadow of the Erdtree” expansion turned out to be huge. The game has many mandatory and additional locations, to enter which you will have to thoroughly study the game world. In order not to get confused in all this, I suggest a clear sequence of passing story levels and bosses. Of course, you should also be distracted by secondary routes to collect fragments of the Tree of Decadence and the ashes of a glorious spirit, which will allow you to upgrade your character for the kingdom of shadows. Without a good level of the blessing of the Tree of Decadence (increases damage dealt and reduces damage received), you will not be able to complete the DLC.

To begin with, a screenshot with a sequential walkthrough:

1. After starting the expansion, head to Belurat, a tower settlement located northwest of the starting point. Kill the Sacred Dancing Lion. Thanks to this, you will be able to go towards the Shadow Haven, but the entrance inside is still sealed.
   
2. Travel to Ensis Castle and defeat Rellana, Knight of the Double Moon. This will allow you to go north to Shadow Altus.
3. Travel north to Shadow Haven and defeat the Golden Hippopotamus to gain access to the fortress itself.
4. Take the western exit from the Shadow Haven, where the grace of the Specimen Vault, first floor is located. Enter the Ruins of Rauch's Abode.
5. Follow the ruins to the Flowerbud Temple in the western area and kill Romina, the Saint of the Flowerbuds. After this, you can go to the sealing tree located on the edge of the cliff.
6. Return to Shadow Haven, this time going up to the top floor of the Sample Vault to fight Messmer the Impaler. Defeating him will give you Messmer's Lucina.
7. Take it to the sealing tree and burn it. You will gain access to Enir Ilim.
8. Return to the Sacred Dancing Lion arena and enter Enir Ilim through the now open door. Although after burning the tree you must move deeper into the Enir-Ilim location.
9. Climb to the top, fight Leda and other NPCs depending on the decisions you made earlier.
10. The final boss awaits you at the top of the tower. After winning, the expansion will end.