There are no necklaces, there are three of them. . .
Footprints in the blue sky
I only played twice in total, and the courage affix necklace exploded. However, the courage ring set did not show up even after the courage ring set exploded and the four affixes were exploded.
rainbow in the sky
After one of these things fell off, it kept falling off. After using the Courage Set, there were 12 deformed ones in the bag.