Granny Weatherwax can Borrow and control a BEEHIVE! Mind you, she does crave a lot of sweets afterwards.
Lancre as a whole gets one when it shoots down Diamanda's claims to be a better witch than Granny: She'd challenged Granny to a staring contest. Against the sun. Midway through, one of Nanny Ogg's grandkids wanders in between them and starts crying, and Granny breaks off to check on him. The young witches say that Diamanda clearly won, because Granny looked away. Nanny Ogg and the rest of the town set them straight:
Nanny Ogg: This is not a contest about power, you stupid girls, it is a contest about witchcraft. Do you even begin to know what being a witch IS? Diamanda: [incredulously] Is a witch someone who would look round when she heard a child scream? The Entire Town: YES!
Nanny Ogg has a few outstanding moments as a Magnificent Bitch. What makes her truly talented is her ability to hide that status, even from Granny Weatherwax, and only using it when she has to. It's been implied that she's at least as powerful as Granny, but less driven.
Notably in Lords and Ladies where she successfully blackmails a god into taking action.
It's been stated at least once that the fact that Nanny can turn it off and just be a disgusting old baggage who doesn't raise any kind of suspicion (except of being drunk, perhaps) is the very factor that makes her more powerful than Granny. Think about that for a bit.
Important to note that Magrat was convinced she was channeling the spirit of Queen Ynci... but it was all her.
And her taking down the Queen as the Queen is hitting her with a massive mental attack.
She was nothing. She was insignificant. She was so worthless and unimportant that even something completely worthless and exhaustively unimportant would consider her beneath contempt. In laying hands upon the Queen she truly deserved an eternity of pain. She had no control of her body. She did not deserve any. She did not deserve a thing.
The disdain sleeted over her, tearing the planetary body of Magrat Garlick to pieces.
She'd never be any good. She'd never be beautiful, or intelligent, or strong. She'd never be anything at all.
Self-confidence? Confidence in what? The eyes of the Queen were all she could see. All she wanted to do was lose herself in them . . .
And the ablation of Magrat Garlick roared on, tearing at the strata of her soul. . . . . . exposing the core.
And that wasn't the most powerful creature he killed in the series.
Only one queen in a hive!
Lady Jane - KILL!
The Librarian's approach to a cruel practical joke is quite mature.
The librarian gets a few in this book, although usually because he's A. incredibly strong and B. immune to the elves' mind-control arrows. Once again, we see that the snares set to bind the spirits and entice the minds of Man are left looking pretty foolish when they attempt to bind the spirit and entice the mind of Ape.
Magrat. Especially the cut to her right after Granny mentions how she'd love the elves.