In the third GrailQuest gamebook, Gateway of Doom, one of the new spells Pip is given in their Second Spell Book is Pip's Amazing Legume Spell, which will give an automatic Friendly Reaction from any attacking vegetable. (Ordinarily, a Friendly Reaction requires you to roll three dice for yourself, and one die for your opponent; if the combined total of your three dice is lower than your enemy's single roll, they're friendly and you can proceed as if you'd won. All spells only require a roll of 7 or better on two dice to succeed.)
You may very well think that this is quite a specialised spell which doesn't come into play much.
You may even think that J. H. Brennan included it solely to set up the joke that if you accidentally rescue a Vampire Carrot (which takes quite a bit of effort on your part, incidentally) it turns out such an absurd spell is the only thing that can save your life.









