I didn't immediately recruit the Deer, because it accidentally dove underground, and there it fought with varying success, spending a lot of time capturing one of the Castles, as it had to come out to the surface.
But I somehow managed to kill Jezebeth on the first try, although I lost the battle in the auto-battle.
At the same time, I upgraded the Green Staff to level 3 - it's so funny to create tsunamis; I always use it in every battle. It's a good staff.
Only one farthest corner remains, and then the Falcon's Nest is next.
It's a good, interesting map.
Added 1 minute ago
And does anyone know why the Necromancer comes there?
First, there's a closed Wall, and then it arrives and stands there, doing nothing.
I came to it, but you can't even exchange artifacts or enter the Castle.
It's some kind of useless thing on the map.