Versions of recurring villains like Strahd will have their own stat blocks reprinted and/or adjusted in Vecna: Eve of Ruin‘s 30-page bestiary. Vecna himself will have a massive CR26 stat block ...

They also all have stat blocks from older editions ... where he became one of Strahd von Zarovich's greatest rivals. If nothing else, you can throw him into a Curse of Strahd campaign for some ...