There are 12 dots on the top above the elevator door. Make all the diagonals add up to 12 to match the dots. The image below is one way to solve the floor:
An expansion to Elden Ring setting players on a new adventure in the Lands Between.
There are 12 dots on the top above the elevator door. Make all the diagonals add up to 12 to match the dots. The image below is one way to solve the floor: