Greatwyrms absolutely busted too btw, a metallic greatwyrm can cast wish 10 times a day. That's more broken then my porch Also vecna's a god guys not a monster
....this is Cap. The only dragons that can spam wish that hard are Stellar Dragons & 1 specific Red Greatwyrm named Inferno. 5e greatwyrms don't even typically have spellcasting, but even if you add the spellcasting trait to them, & use 3rd edition epic rules, you're talking about 40 levels of Sorcerer, and apart from the Epic dragon species(Force, Prismatic, Time & Stellar), 3 dragons in the history of Toril have reached that power level, one of whom was an actual Demigod, and the other two were more then strong enough to be. That is Not the power level for an average metallic greatwyrm😂
Vecna is a Lich not a monster I know leeches are in the monster manual, but he’s named That means we’d be able to include the Demogorgon Yeebgourath and Orcus all the powerful devils Teamat