A Halloween Anagram

During a séance, receive a message from the dead and identify the merely thought-of deceased person who is being contacted!

Various authors have contributed clever ruses and alternatives to disguise the use of progressive anagrams; this is my solution!

“Your idea of a pendulum/anagram is super good. I'm really surprised that it is not better known. It's kind of the ultimate justification for an anagram.” — Julien Losa