Tip for creating a memorable BBEG? An NPC betrays them, beats them to near death and allows them to live, rendering everyone unconscious. You want your players to follow the plot? Make it personal.

You've been playing 2e all along

Ok, "rolls dice"... it's a 3... for a total of 24.

I use divine smite through my kobold gauntlet...

Mmm mmmm, just like mom used to make...

It was so nice my DM let me use stone giant as my PCs race.

SUPERCOW7

...and the world's greatest assassin no has a backstory.

Put your manuals where your mouth is...

Oof... but chuckle chuckle.

Consent is key...