PSA: You can still dupe Temporalis.

There is a bug in the Trial of Sekhema. If you are in a party with another person and open the final boss in the Trial of Time, you can log out, switch to another character, rejoin the party, and enter the boss fight again.

You can defeat the boss and collect the loot, but you won’t be able to enter the room with the chest. Afterward, you can simply return to the character selection screen and repeat the process. This exploit allows you to repeatedly fight the final boss in the Trial of Sekhema, creating an infinite divine printing loop.