What is your suggestion?:
Make it so that the nightmares instance goes based off of the clan chat you're in similar to raids.
In OSRS players have hundreds of worlds to choose from, on here we only have one. Instead of making players wait 10-20 minutes for whoever is in the nightmare to finish up, allow them to join their own instance based off the cc they're in.
Is this in OSRS?:
No, OSRS has different worlds
Has this suggestion been accepted already?:
No
How would this benefit Alora?:
Allows players to kill the nightmare in their own group instead of having to wait for others to leave it.