I just killed Rakshas...On Nightmare in "An Old Friend"

[TQU]

Here is my replay of killing Rakshas on turn 13 on nightmare difficulty, without Father Morvin/Sister Thera resurrection or losing any of my units. Played on Wesnoth version 1.16

[WarDead0]

Here is my replay

I just found my old replay of this from about a year ago (on the current version). I think I needed to do a lot of saves and reloads too, which I assume was done here too (about +25% hits and +30% defense I think, until it crashed). When I played I did a cheat to see what would happen if Rakshas was killed and he ends up just running away.