Chaosmancer
Legend
I find it odd that some players would want their characters to be immune from death yet 5E has the most death friendly Ress spells of any edition.
Revivify is a 3rd level cleric spells and by the time heroes are that level 300GP is fairly trivial. Plus if your DM is so set on keeping them alive, scrolls etc of Revivify can be sold or found.
If it is so trivially easy to overcome, then it is a terrible thing to base the tension of an adventure on. So why get upset when people find other ways to have tension in their games?