Playthrough of Cuphead: The Delicious Last Course DLC's secret boss - Angel and Demon.
Graveyard Puzzle Solution guide:
1. Buy the 'Broken Relic' from Porkrind's Emporium.
2. Talk to the three standing NPCs in the podium to get the puzzle clues. The directions they mention are the clues.
3. Interact with the correct gravestones. After interacting the correct gravestones, middle gravestone will start to glow. Interact with the glowing gravestone and take a nap to start the boss fight.