One of the mechanics of the setting I'm developing includes soul weapons. One of their main aspects is that they can become ethereal and pass through matter.
So, what would happen if someone poked a wall or a person while it is ethereal and turned it solid inside of them.
Assume that weapon, a sword as an example, materialize from the inside out without overlapping with other atoms or suddenly occupying the same space as them.
Assume also that for all intents and purposes, when materialized, the weapon is made of real atoms and that no matter how strong the material is, the weapon will always completely materialize.