"Hey!" comes a voice "What are you doing, drinking from my stream?"
You look around, but don't see anyone else. "Down here!"
Following the sound, you see a large, squat toad sitting on a rock. "You were speaking?" you ask.
"Took you long enough!" retorts the toad.
"I never knew toads could talk." you say.
"They don't you numbskull!" the toad replies rudely "I'm a witch who was turned into this form by a do-goody fairy. I still had enough power to curse this brook," she says with an evil grin "and now that you've drunken from it, I have the power to curse YOU!"