Most scary "Villainous" Mental Breakdown?

Not a villainous character really, but if somehow lost it and unleashed all the stuff he's been hoarding, it would basically be the apocalypse

Because, at least in his lore, he has never lost

Im pretty sure that has mental breakdowns already.

From what I know about Veigar, he mainly talks a big game despite never accomplishing anything with his potential. He will threaten your loved ones, speak of great plans, and laugh maniacally.

I know villainous breakdowns usually involve cold and calculating villains going nuts, but I think the reverse is even more terrifying. Because when they stop talking, they are either speechless or just done with you. The moment loses the need to talk is the moment the world will know true darkness.

Similar to but obviously not on the same level of evil. Like the Joker, Jinx is playing a game with Vi. What'd you think will happen when can't play anymore?

Another similarity to the Joker in that he fears being forgotten, being unimportant. He probably broke when Shen's father refused to kill him, ruining the legacy of the golden demon.

Release the beast.

Veigar:He can easily scheme and start using magic seriously to kill anything thats not inmortal, or jjust drop em into event horizon

Aurelion Sol:You know how it usually ends when you piss off a god with a big ego in video games, they go nuts and try to erase all creation

Mordekaiser:LICH ARMY BOYS

If they lost to Kayle

Sure, he's already crazy, but he has some grasp on reality, and his attempts at evil are stunted by his own incompetence. If he were to completely lose his mind and just go completely berserk, holy fucking shit so many people would die. This is somebody who drops DEAD STARS on people.

Also , If he's terrifying when he's having a good time, I don't want to imagine what he's like when he's having a bad time.

He's totally in control. Of the mayhem, all the chaos, it's all calculated. I don't want to see him having lost it.

would either order all his troops to kamikaze, or just go full bird demon and throw his humanity out the window.

I mean Syndra is already treading dangerously close to that path. And since she is all about unlimited power it would be pretty scary to see what she could do with no control.

The answer is always