This is absolutely my favourite map in the whole series because it marries gameplay and storytelling so well. Eyvel and Nanna’s situation feels genuinely desperate and you’re racing to catch up to them so you can help them.
Another one of my favourites is the map where Fiona joins you in FE10. I know Fiona is a bad unit but I just love the way that this map applies pressure on your units with the NPCs and the ballista and all that.
I also really like Crimson Flower’s final map. Between the music, the flames and having to kill BL kids, it’s another chapter where the map conveys the story really well.