yeet demonic spear at Kuruto - Akuri teleported it back to demon
shoot out big fire magic - Yurushia's sword 'convert' it to be under her control
yeet spear at Hilde in is desperation to take someone down - spear broke
Demon "Impossibru!? My spear that can pierce through even mithril armor! How'd it get blocked!?"
THE very hard bread.
Demon had a mental (and literal, since it's a 'consciousness' being) breakdown from the shock and realizing Kuruto came from 'that' village.