You were a soldier that fought in the Great War, and while you were on the battle field, you got seriously injured and almost died

One of the first things you remember was a voice of a small girl, then waking up in the infirmary room

"Special ability: Thou Shalt Not Die!" The little girl said, and a bunch of butterflies appeared out of nowhere. Every wound was healed and you woke up, feeling fine

"Are you alright?" The girl asks, looking down at you while you lay on the mattress