Picture it: 3.0 Edition, final battle of a months-long dungeon crawl, the party finally makes it to the lair of the ancient green dragon. Parlay goes nowhere, and combat begins.I've got my story of the world's least impressive lich fight over here. What about the rest of you guys though? Have you ever put a load of time an effort into making a scary encounter, only to have your big bad go down like a chump? How did you deal with the crushing disappointment? (Or were you secretly rooting for the PCs all along?)
That would be our Sunday night PF campaign that wrapped up back in Nov.
I ran Reign of Winter from Jan.8th '17 - Nov.11th of '18.
All 6 books, lvs.1-17, many modifications/twists/turns/etc based upon the characters & RP. Nearly two years of great stuff. To date it's the only PF AP that we've ever actually finished.
We almost wrapped it up on the 4th, but it was getting late & everyone had Monday morning to look forward to.... So rather than start THE final fight & then have to pause it, we chose to call it for the night & finish the campaign the next week. Everyone expected this to be a fairly lengthy encounter. And I was well prepared.
So the next week comes & one of the players decides to open with essentially a hail mary, hard casting a Trap The Soul on the villain as they entered the room (provided they survived the entry - they knew the villain was well prepped & had the initiative on them).
ALOT of damage/effects were suffered upon entry, but the party did survive.... The spell was cast, bypassing SR.
All I have to do is roll a 2+ to save. And I have a re-roll.
So of course I roll a 1.
And then a second 1 for the re-roll!
Everyone sat there in silence for a moment. Nearly two years of play had pretty much just ended in snake-eyes.
Of course the rest of the fight, even though a mop-up action at this point, was still a really tough battle. The Witch Queens minions weren't about to just concede....
But really the campaign ended with that botched save.
And that is exactly why I always roll in front of the players.
Meh... I make the players make the rolls. All of them.As do I.
Especially when it is such an important roll.
I too had a lame lich fight. Had a lich with a staff of power, who had dominated a Raksasha and a mind flayer (lich loved dominating dominators).
Lich also had a staff of power. First round barbarian Rips the staff from his hand and breaks it. All the enemies die from the energy blast, but the “take half damage while raging” barb makes it through.
I'm actually thrilled when my players bat above what I expected them to. That means I can dial it up a little bit more.
Why is that combat over? As soon as they kill the tiny 'seal' hit points the rhemoraz is back in action. They'll get a round of doing a lot of damage to it, and the damage will carry over, but it's not instantly dead.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.