An adventurer cast Wall of Force around a Lich, imprisoning them inside a 5ft hemisphere. The Lich, having Wall of Force prepared too and not fearing death, tries to cast it from inside the hemisphere on themself.
My group love to cast Wall of Force on my bosses, and it's quite understandable. Preparing my next boss, I realized that I don't know what would happen if someone tried to cast a Wall of Force while inside an enemy's hemispheric Wall of Force.
The spell explicitly states:
If the wall cuts through a creature's space when it appears, the creature is pushed to one side of the wall (your choice which side).
Nothing can physically pass through the wall.
I'm pretty sure the boss won't clip1 through the Wall of Force but can the spell even be cast and, if so, what would happen? RAW answers are preferred.
1: a videogame term for an entity abusing the physic and hit-boxes to go through elements usually impassable