Stellar Blade- The Great Desert: ALL Body Core Health Upgrade Locations (see pinned comment) 

There is one final 4th Body Core in the NorthEast corner of the map (top right). Start from the opera house phone fast travel and head over to the northeast corner and you will see it very easily at the dead end and of a street surrounded by enemies. Sorry I missed this one, I found 3 and everywhere I looked online said there were only 3 until much later I got a couple comments.

Thank you for the videos, they have been very helpful for my platinum run. 👍🏽Only need 3 more, then I'll be maxed out.

Appreciate this, you helped me find the last 2 body cores I was missing.

Great guide, very helpful thanks!😊

bro you are life saver, keep em coming

There's one more in the eastern end of the Buried Ruins area. From the Opera House, go north east then follow the path east up the hill all the way until you see a fence. The body core is near there.