I'm guessing this was Thrud's plan to make him suffer like she did. She can't touch Kamila, but by tricking him into taking a friend's life himself it will hurt so much more than Thrud simply killing them.
Trud made a huge mistake. The lost of phloria will have her cost nearly nothing and she will have only needed to fight the Supreme magus. Now she will need to fight the Destruction.
all these chapters have been great, but honestly phlorias death seems kinda stupid. liths super paranoid i think he should notice things are a bit wierd and why would he go for her vital organs and not like, the stomach if all he had to do was hold war in her