No Digits. No Clues. No Hope!

▶ NEW SUDOKU PUZZLE HUNT JUST OUT ◀ You can find our brand new sudoku hunt on Patreon now! Can you unlock the secrets of the Wonders Of The World?!! ********************************************************************* Today's puzzle looks completely impossible! It's by Mesmer and it's really rather wonderful. You can try it yourself here: Rules: Normal sudoku rules apply. Digits cannot repeat in a cage. The value of a cage is the sum of the digits it contains. The value of any cage must appear only ONCE on the board. Eg, if a cage value is determined to be 15, there is not another cage with the value 15. The inequality sign is pointing to the smaller digit of the two cells. The cells on the diagonal pointed to by the arrow sum to double the value of the cage marked with X. Digits can repeat on the diagonal. ▶ S