Any tips on making this 20th level Oneshot?
I’m running a one shot for my players later this month. we wrapped up our campaign, and so I talked to the players who thought it’d be fun for a high level one shot, where I throw all i got at them. I’m basing the plot off of a loose thread from the main campaig, and some of the characters are returning, others are notable figures in the city. I actually got permission from one of the players to control their PC, which will tie into the plot.
The premise I guess of this, is that a demon lord has been summoned onto the material plane, and the players need to defeat it banishing it back to the abyss. the demon lord is Ychak the violet flame (who apparently has dnd history that i ignored when using the name in my campaign and fit my players warlock backstory).
Ychak is a demon specializing in possession. I like the idea that he’s lower hp, but can body hop into other creatures and people, though while he possesses them, they burn up. The place that he’s been summoned however has a phoenix that appears once every 5 years (and wow look at the time) I’m thinking itd be cool to have a battle where the demon lord is possessing a more powerful version of a pheonix, who revives a few a rounds after it’s defeated, essentially giving ychak a “permanent“ vessel it can possess. However, i don’t know exactly how I should balance an enemy like Ychak, who can possess and not be hurt while in a vessel. granted this is 20th level do I’m tempted to make him a weaker statblock than all the other demon lords, but I just don’t quite know what I should kind of expect.
Any ideas?