After climbing up the ceiling of the dome in the previous section, Lara arrives in the boss chamber at the top of the hall. Save the game in a new slot before entering the room or immediately after the cutscene. You'll probably want to play the next section twice: once for the achievement/trophy and once for all pickups. Also, make sure to read the new Notebook entry for the "Memento Mori" achievement/trophy.
The main walkthrough includes an overview of the boss fight mechanics. If you want the "Ghost in a Nutshell" achievement/trophy, you'll need to get the painting and escape in 1 minute or less, without taking damage. If you don't care about this particular achievement/trophy, instead use the slightly easier alternate strategy.
For the achievement/trophy, bring out the heavy weapons immediately. If you have the dual Vectors, use them. Otherwise the shotgun will do. Backflip off the steps where Lara is standing after the cutscene, get a lock on the ghost, and start firing.
When he swoops toward you, immediately duck to avoid taking damage. You can shoot while firing, but once he passes overhead...
...stand up, turn around, and continue shooting, while backing away from him toward the statue holding the painting.
As soon as the ghost's health bar is depleted, and his red glow disappears, quickly holster your guns (otherwise Lara can't run straight)...
...and run to the statue with the blue light. You'll notice the boss health bar quickly refilling as you go. When it's full, he revives, and the painting moves to another statue.
So as soon as you see the Hand icon, press Action to grab the FIRST OBSCURA PAINTING (11, if you skip the other pickups). It may help to approach the statue on a slight diagonal and grab the painting from the side.
Then crouch again so the revived ghost can't hurt you.
The exit (same as the entrance) opens when you take the painting. Crawl toward it until you're sure the ghost is not in your way.
Then stand up and take running jumps through the doorway and down the stairs.
If you make it in time, and haven't taken any damage, the achievement/trophy should pop when you reach the bottom of the stairs.
Now, you'll probably want to reload your earlier save and replay this section the slow way to get all the pickups. If not, just continue "EXITING THE RUINS," in the following section.
[Previous | Next | Hall of Seasons]
DARK MODE: I plan to add optional dark mode for these pages, but my current priority is updating the walkthroughs. Meanwhile, may I suggest a reputable dark mode browser extension, such as Dark Reader? (Download only from trusted sites, like darkreader.org or your browser's web store.)
Walkthrough text and diagrams copyright © Stellalune (email ). Feel free to copy or print this walkthrough for personal use. By all means, share it with friends, but please include this credit line so people can send me their feedback. No part of this walkthrough may be reproduced on another site without permission.