It should have not been a mystery to Luke that when he respawned back to reality, inside of his ship, the first thing that greeted him was severe weakness. He had been warned numerous times beforehand, even when he first came into this universe, that the effect of the Abyssal Sea on his soul would make his physical body frail. He had already been pushing himself by creating Guthix, using Anima to temporarily assume an older form of himself, and get into a "duel of the fates" with the leader of the Sycorax for Earth, yet this first death of his made his body revert into a frail state.
He had collapsed to the floor of the Residential Deck as soon as his soul was housed back into his physical vessel, yet even with severe weakness and frailty, Luke knew that every single death would essentially reset his physical vessel back into this frail form and that he'd need to re-train his body to even walk again.
"Oh, I'm very jealous of that Time Lord," Luke thought to himself as he strained more to breathe and re-train his body to breathe in and out. "But I'm glad I didn't choose that race. I'd have a headache trying to reconcile being a human soul in the body of a Time Lord."
As he steadily got re-used to breathing and the body's natural processes took it over, Luke knew that the next thing to "snap back into place" was the muscle memory of moving. While retraining his body was beyond insane to do, it was the price Luke knew that had to be paid over and over again if he wanted to keep living.
During this recovery time, Michael kept track of the Doctor and Rose's movements throughout time and space. Both he and Luke knew that time was not linear and the Time Lord was all over the place. He could be in a different region of space, in Earth's past, in the far future, or regenerated into a female form. As it was, both the Doctor and Rose were currently dealing with the events of the episode dealing with the New New York hospital.
From what Michael observed, it seemed like most of the events were basically just centered around what happened with that skin fillet that barely survived the destruction of the outpost. Even as Cassandra played around with Rose and the Doctor, Michael knew that she wouldn't survive her attempt to control Luke's body. The simplest answer to why was that, besides Luke's soul, his body was made up of matter reinforced by Anima and the sheer amount of it was far more than enough to kill any Time Lord stone dead.
Not even their ability to regenerate would have saved the consciousness of one who dared attempt to seize control of Luke's body. This alone was enough to make Michael understand how Cassandra wouldn't survive.
Then, the episodes events slowly concluded in where the Doctor sent Cassandra back in time to when she was still pure human and her past self witnessed her future self perish within Chip's body. It was a fitting end to that character.
After that, Michael kept observing them and their adventures.
==[DW:NG]==
It took Luke the better part of an entire day to fix his muscle memory to a sufficient level that he could manage walking short distances. He couldn't walk the entire length of his ship, yet it was enough for him to walk around the bridge. The System did inform him, after an hour of retraining his breathing and with his first death, that full recovery would take roughly three days and get more costly from there.
For each death, the number of days would increase by the number of deaths times three. This roughly meant that one death was three days, two would take nine, and so on. It gave Luke a sense that, while unable to stay dead, every death was costly to endure.
"I am gonna have to pick my battles carefully," Luke thought to himself when he sat down at the helm and recalled the information. "I'm not a Time Lord nor am I Jack Harkness, but I am going to have to make sure I don't die often. I already hate having to recover from this first death."
He took a moment to breathe in deeply and look through the events that happened while he recovered some function. With his death on the ship, the Sycorax were destroyed like in canon by Torchwood. Harriet Jones lost her job as Prime Minister through the Doctor's actions, Rose flew away with him, and events seemed to return to normal.
Luke smiled as he read through the event logs on his ship, yet something nagged at him. It wasn't about his family as he knew they were safe (albeit worried for him) nor what happened with the Sycorax Leader. He knew that, to keep his future knowledge actionable, he had to let the Leader play his cowardly attack and kill him in front of the Doctor.
No, what nagged at him was the vague sense that someone else had been watching him. Someone able to hide from his sight and be relatively undetected even by Anima flow.
Luke knew he couldn't do anything about that for now as it can't watch him in his ship. He didn't know how he knew that much, but he did. All he could do for now was recover and try to move on because the System did notify him of what the next Canon Event he could do.
Luke sighed and shook his head slightly as he remembered the episode in detail. He knew that students were eating Krillitane oil-fried chips and gained enhanced cognitive abilities as a result, yet the reason for that was sinister.
The Krillitanes were attempting to crack the Skesis Paradigm by using the souls of these children and the Doctor put a stop to it with the help of Sarah Jane Smith. He knew that, as the literal embodiment of Anima Mundi in this universe, he wouldn't need the Paradigm, but that wouldn't stop Luke from overturning their plans.
Besides, he liked K9 and would help the Doctor against these foes soon enough.
==[DW:NG]==
Continued in: The Seed of Gielinor.