Isn't that where you just put the plan away and then the next campaign happens to be the same evil plan with minor tweaks? Throw it two campaigns from now if you wanna be fancy about it. Clearly the campaigns weren't the same. They never found out the details of the first one, so how can it be the same?

Does the process of getting to the BBEG not involve unraveling their plans? Like, shouldn't the party to a certain extent know their goal(s) before deciding to go after them? And then particulars are divulged as they uncover the threads tying the BBEG to all his henchpeople as they defeat them. And then they understand the steps of the BBEG plan as they track down the items needed to stop them? I'm sure there are some minor things not 100% spelled out, but what did you really want your party to know that they didn't already?

This particular character was more of the penultimate evil dude and was also a former ally that betrayed them. So it was more of his motives for why he did what he did.

Ooh. Nice. I never mess with ally betrayals because I honestly don't think I have the chops for it. Very hard to do, so I totally get how you wanted to give them a proper send off. I'm sure the players enjoyed their swift revenge though!

Or you could have the players find their journal with the plans written down after killing them.

That's how they did it in Watchmen, except the writer was in control of how long the battle lasted.

If your BBEG doesn't have at least one counterspell (or someone who does on their team) your casters are always gonna go in guns blazing lol

What? Polymorph might disable the target, but if its a single target boss fight, what does that help? Whether you kill the transformation or wait for the spell to time out, the result is the same

Yeah I think that can be a trap a lot of newer DMs can fall into, not understanding the difference between mediums like TV, movies, or books and the collective nature of D&D stories. Really extended sequences that require things to go a certain way are risky in D&D because you never know what the players will do!

I would caution players to think of the logical endpoint of zealously interrupting villians with combat. Players: "Stop you thugs or face the wrath of-" DM: "They attack you, sounds like they get a surprise round"

I guess their assumption is anything cast right away will have Legendary Resistance used if the save is failed and the spell is sufficiently debilitating, so better to use Polymorph since it's lower level but strong enough to warrant using LR.

Also if for whatever reason it does succeed, turning the bbeg into a chicken right as they begin monologuing is infinitely funnier than just disintigrating them.

Disintegrate does x damage. You know what does more than x damage? 3 other characters holding their attack and spell actions after you bap the lizard sitting in a cage, after killing all of their henchmen

I feel like you gotta know the party a little bit... If they aren't the type to talk their way out of a problem, then the monologue has to happen from some relative safety instead of within arms reach of the not-paralyzed barbarian. Hold person exists. Magic Mouth. Message. Hell, a big ol' balcony above the party. Else you gotta have a back-up plan like fallout where the players get the information from a journal or something - maybe it isn't as clearly laid out and it's harder to follow the breadcrumbs but the party isn't just lost in the wind looking for the next guy to punch.

Monologue through a stone of farspeech or a ward-tripped illusion spell. Hell, have the villain's illusion disintegrate only for it to trip 18 other wards that all seamlessly continue the monologue in a deafening cacophany of voices, like the BBEG knows alllll the tricks. I feel like a good DM can get creative on the spot, even if it trips them up a bit.

That sounds unreasonable. If you're stepping up to known thugs to threaten them with violence, violence is expected by the party. There should be no surprise here.

> but the party isn't just lost in the wind looking for the next guy to punch. Eh, there is merit in letting them suffer the consequences of their actions

This is entirely based on the assumption that they're playing 5E. I don't think any other game has legendary resistances

No, counter spells are strictly reserved for revivify

By the rules of the game you can't surprise someone who is aware of your presence, so you're correct. That also means you don't automatically get to interrupt a monologue by blasting the bbeg in the face mid-sentence. You need to roll initiative to see if you are able to act before they can respond.