Do not step on any of its leaves. Just - don't. That shows an amazing amount of disrespect and at this point none of us need to piss off anything that could potentially help us, right? The spirit in this tree is tied very closely to revenge when it's upset.
Likewise, don't cut off any part of the tree. That should go without saying. Just don't mess with the tree, all right?
Also, don't eat any rice beneath it, because that's fertility magic.
"Peter," you're probably saying, "what are we going to do with the tree?" I'm so very glad you asked. Stiles, we're going to need a few objects that belong to your father. Hair, favorite shirt, other identifying things that represent different aspects of him. These we'll hang from the branches at sunset as soon as the park is closed.