How to make venomfang an interesting fight
I'm very inexperienced when it comes to anything but low level DMing. My players have just finished up WEC, and are going back to Thundertree to get Venomfang. They had an encounter back at level 3 where he stripped them of all their gold in return for letting them leave his tower alive, and they've been talking about getting revenge constantly since then. It's the last thing left to do in this adventure before I move on the the Shattered Obelisk, and I want it to me memorable.
They are level 5 now (Berserker, Elemental Warrior, Psi Warrior, Devotion Paladin, and Necromancer), with all of their magic items that you would expect from the adventure except the MM wand. I want the fight to be difficult and deadly, but not unwinnable, and it will be their first fight since reaching level 5 so I'm having a hard time trying to guess how to scale it to their new power level.
With how much damage they've been able to pump out before, I dont see venomfang lasting very long, but I'm going to make him summon a bunch of twig blight minion every round to harass the characters to try keep their distance. I'm also wondering if I should have the dragon cultists be a part of that fight too, or have them as a seperate encounter before venomfang. I would obviously have to buff them up a bit so they dont get immediately stomped.