Thanks! Check out the following:
SilverClawShift here on GITP (author)
Kaveman26 here on GITP (author)
Peldor.org has a 20-year novelized 2e campaign log. The campaign ended, but some characters continued on.
Sagiro's Story Hour is pretty long and epic as well.
I am terrible at remembering conversations and all the details of exactly what happened in what order.
Death Ward would block it. No need for a separate "Negative Plane Protection." Here's the article with different ideas on how to do Level Drain that I drew from:
https://www.flutesloot.com/level-dra...mebrew-dnd-5e/
Revivify does still come with the exhaustion penalty of having gone to 0. I don't want too much of a death spiral.
Energy Drain and Exhaustion are different effects with different sources. Exhaustion comes from the players making mistakes and going to 0, which is (usually) avoidable. Energy drain comes from enemy action and is sometimes unavoidable, so it needs to be easier to cure or mitigate.
I will probably let vampires inflict some energy drain without biting, or beef up their ability to hit with bites vs. the 5e default. Grapple (no damage) then bite ends up being relatively weak, and fails if a simple +9 doesn't hit. Vampires' big threat comes from Charm and I don't want a series of vampire battles to be one big contest of Charm stuff, as that would get old fast and hurts player agency more.
I have a while to decide, and might end up just test-running the mechanics in a quick one-shot here if I am not sure I've made the right choice.