Lisi glanced lightly at the wand in Su Er's hand and said gently,
"We've lived in this forest for hundreds of years. One of the conditions for being allowed to live here is that we cannot harm young wizards unless we are attacked."
"Over the centuries, this magical oath, sworn by our ancestors and the Hogwarts Headmaster of that time, has become ingrained in our blood."
As Lisi spoke, she walked toward the only table in the room, where a teapot and two cups stood, seemingly prepared long ago.
Su Er watched her every move without blinking.
"So you needn't worry that we'll hurt you." Lisi first set the Bowtruckle gently on the table, then lifted the teapot and poured two cups of tea.
"Would you like some tea? This is a magical plant we grow ourselves. It's not poisonous. Sometimes, I use it to keep myself clearheaded."
"Chirp, chirp!" The little tree creature waved, pointed at the teacup, and nodded vigorously, as though saying, come over here, she's telling the truth.
Despite what the centaur said, Su Er still did not lower his wand. His body relaxed a little as he walked toward the table.
The air was still, with only a faint aura about Lisi that made Su Er feel at peace.
Holding her teacup, Lisi gestured to Su Er, then drained it.
Mom said never to eat or drink anything a stranger gives you, because you don't know whether they'll cut out your kidneys or sell you off to some remote mountain village once you've fallen for it.
Besides, who knew whether this centaur was telling the truth about not harming young wizards being ingrained in their blood?
But the centaur had drunk it, so it probably wasn't poisoned, right? He had watched Lisi pour the water