Is he imagining the witch praising him or are those flashbacks?

He keeps on dying because of the demon lord so he’s being returned to 24 hrs ago every time. And since it’s being repeated all over again every time he went back in time, he found ways to minimize the casualties.

I get that part... but that doesn't make sense to me yet if he's imagining the praises or somehow she really told him about casualties

its flashbacks

I see!