Please creat a new type of Whisper that has a different color than the blue Whispers, perhaps yellow or red, which serves as a temporary respawn point. This new Whisper could be placed in the final boss layer of the endgame trial, allowing players to repeatedly challenge the ninth-layer boss without having to fight through the other eight layers again.
The yellow/red Whisper would only provide the functionality of reviving the player or teleporting them back to the previous blue Whisper. Once the player returns to the blue Whisper, they would not be able to go back to the yellow/red Whisper. This would give players the opportunity to repeatedly challenge the boss without having to restart from the beginning, even if they run out of resources or their equipment is damaged.
In the given scenario, when the player reaches the ninth layer and interacts with the yellow Whisper, they can enter the boss arena and, if defeated, respawn at the yellow Whisper with 1 HP. At this point, the player can choose to use consumables to restore their health and continue the challenge, or they can interact with the yellow Whisper to return to the previous blue Whisper.
For multiplayer mode, the yellow Whisper could be disabled.
Additionally, it’s recommended that the “Travel to previous Whisper” option should indicate the location of that Whisper, as players may sometimes forget where I last teleported from and have to waste time confirming the location by teleporting again.