Hello ,
I was wondering : if I would visualize my chakras either extending into a healthy tree or being temporarily attached to a tree such as by an umbilical cord, could I vampirise a tree by seeing energy being sucked into my root chakra and then moving up to my head ?
Yes, though there is really no need to “vampirize” a tree (which denotes taking by force and draining something). Trees freely give their energy, all you have to do is ask. That is why simply leaning against a tree can refresh you, and why some mystics, like Edgar Cayce, meditate against them. They naturally absorb negative energies and ground them out, replacing them with the good stuff.