
In the last section, you defeated the Fiamma Nera cultists guarding the entrance to the inner sanctum then slid down into the arena. Marco Bartoli's body lies on a low platform at the center. Don't get too close yet. When you approach, he magically transforms into a massive DRAGON (11), and the final battle begins. Obviously, save the game before triggering the transformation, just in case.
Below the floor is a water-filled room containing 10 sets of Uzi clips and 2 large medi packs (13-24). The square holes in the floor lead down there. If you're careful, you can retrieve most of these items before Bartoli changes. The change only occurs when Lara steps inside the "trigger zone," which extends one tile beyond the central area with the four columns. As long as you avoid this area—both above and below the water's surface—you'll be safe. Read on.
If you have plenty of supplies, you can wait and collect everything after the fight. Skip to the next section.

To get most of the goodies before fighting the dragon, begin at the nearest hole on the left side of the room. Drop in.

Then swim down and forward, keeping the wall on Lara's left. Take the large medi pack (13).

Then continue forward along the left wall. You can grab the next 2 ammo pickups (14-16, three sets of Uzi ammo in two piles) just ahead, but be careful not to go any farther to the right. Surface in the third hole...

...and climb out of the pool, avoiding the right side of the hole, since this is inside the trigger zone.

Turn right and follow the back wall to the next corner, again taking care not to get close to the pillars.

Turn right. (Bartoli and the room's entrance are now ahead on the right.) Drop into the pool...

...pick up the other large medi pack (17) and swim forward, again staying close to the left wall.

At the next corner, turn right, pick up Uzi ammo x2 (18-19).

Continue forward, still keeping the outer wall on Lara's left. Now you're heading back toward the hole where you first dropped in.) Ignore the ammo pickup just ahead on the right, since it's inside the trigger zone. Pick up Uzi ammo x2 (20-21) directly ahead. Then surface in the hole and climb out.

You're now back where you started with all all but 2 of the available pickups. Save the game once more and get ready to fight.
NOTE: If you accidentally trigger the dragon transformation while underwater, it can be difficult to climb out without getting toasted by the dragon's fire breath. Either reload or swim up to one hole to get the dragon's attention and then quickly dive down again. Swim to another hole on the opposite side of the room and climb out as quickly as you can. The dragon may not be able to get there as fast as Lara can.
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