Michael had a few plans up his sleeve, but he followed the simplest path by using Mind Watcher to read the half-dead Divine Dragys' memories. He used Greater Enhancement and Soul Tears on Mind Watcher to read as much of the Divine Awakened's memories as possible until he managed to kill himself.
Michael sensed the ignition of the Divine Dragys' Energy Pillar too late. Despite being drained and sucked dry, the Energy Pillar was still a construct of compressed energy. Once dissolved, an enormous amount of energy was unleashed. That would have been problematic if he hadn't actively using Mind Watcher.
In the first place, Mind Watcher allowed Michael to read the Divine Dragys' thoughts and perceive his intentions early enough to see what was happening through Seer and True Vision. That didn't give him much time, but a second was enough to do something very simple.