I feel like I need to remind people that this is a meme. It isn’t meant to be taken seriously.
Good Me: Hey, if the party wants to use revivify on an NPC, that’s really sweet. It shows they’re emotionally invested in the game. Don’t have the lich counterspell it.
Evil Me: Yeah, have the lich use disintegrate immediately afterwards, instead. Try rezzing that, religion nerd!
Is that Danny Devito smacking Bob Odenkirk in the face with a 2x4? What the heck is this from?
If I’ve truly painted myself into a corner in a situation like this I’ll sometimes break character to let the party know that the NPC is suffering from “cutsceneitis” and offer them a get-out-of-death-free token they can redeem later if they’ll let this current guy go as planned.
Generally speaking it’s better to roll with it if at all possible, though. You can perhaps Final Destination the guy and have him be a bad luck magnet for the party until he’s taken care of. Or just throw out your plans and see where this new adventure is going to go. I still regret not doing that a few years back when there was a sole survivor of a battle whose only purpose was to spout a few lines of information and then conveniently die, and the party tried to save him. If they’d succeeded I now realize in hindsight it would have been a lot of fun, the party would likely have wanted to kill him themselves in the end.
Aw, come on now. They saved them fair and square within the bounds presented to them, and they almost certainly did it because they genuinely liked them. And you cheated them out of that win for… what?
Don’t let your attachment to a pre-conceived idea of how things will go cause you to deny your players something that they’ve rightfully earned, especially when it’s likely a small flavour thing that they care about. That minor NPC isn’t going to break any plots or questlines.
100% I care far more about relationships with NPCs than the overall plot. I favor role play over battle. The experience is more enjoyable if the GM honors the decisions and efforts of the players. Then everyone can discuss and laugh about the debacle afterward. I’m going to tell my GM how much I appreciate him now!
I can remember one time when the party DID NOT want an NPC to die. The next session we got sucked into a book with a new mission to save the NPC from their fate (and put the plot back on track). I remember it because my skeleton fighter with -2 cha had to sing “Be Our Guest” to distract story baddies at one point… it didn’t end well.