Anyone who thinks high level D&D characters can’t die, probably hasn’t tried very hard. They are still vulnerable if you hit them hard enough. What is true is that it is more difficult for a published adventure designer to judge how a group they don’t know will fare.

— Merric Blackman (@MerricB) July 21, 2021

One group might be immune to poison, another have incredibly high ACs, another counter ever spell used against them. I think that it is important to send a range of threats against high level parties. Some they’ll handle easily. Others they won’t.

— Merric Blackman (@MerricB) July 21, 2021

It should be noted that adding additional party members has significant effects on balance.

Imagine a party of Fighter, Cleric, Wizard, and Rogue at 18th level. Formidable, huh?

Now add another 18th level Cleric or Wizard to the group. That's another ball game.

— Merric Blackman (@MerricB) July 22, 2021

“If it bleeds, you can kill it.”

— Alphastream – Fully Vaccinated And Masked (@Alphastream) July 22, 2021