Aziz's bayonet had a very special origin. It wasn't a looted treasure; Aziz actually brought it into the nightmare realm from the real world.
The original form of this bayonet was a dagger used by the American special forces. This dagger first killed Aziz's father, mother, grandfather and grandmother, then finally stabbed into Aziz's thigh. He was only two years old at the time.
The dagger became his only toy when he was a child. After twenty years, he stabbed the dagger into the heart of its original master.
When he was discovered and then recruited by the nightmare realm, the dagger came in with him for some reason. As Aziz became more familiar with the realm, he finally paid some money to have a contestant with a forging ability forge the dagger into a bayonet.
Bonus chapter coming later.