Yang finds the crown of the brood lord.

As Ruby blitzed off further into the vault with Weiss and Blake running to catch up, Yang is fallowing suit herself but something catches her eye in one of the near by vault chambers causing her to stop.

"Hmmm what do we have here~" Yang says to noone in particular as the others are far to ahead to hear her.

Yang found a simple gold ornate circlet with an amber colored jewel at its center.

Yang sees the terminal next to the display case and activities it to see what this crown is. A hologram of a much younger ozpin appears before her freaking her out.

"Greetings to whoever has entered this vault as it would mean dire times have come upon us that would require these artifacts I have collected over my incarnations. This one in particular is the crown of the brood lord. I procured this item in my previous incarnation as the king of vale during the war. What it's capable of is as followed"

1. The bearer is capable of being the proverbial lord at the center of a hive like colony made up of their own children with a hive mind with said children
2. The wearers fertility is skyrocketed to where pregnancy is not only a 100% guarantee but so are multiple children per pregnancy, highest recorded after accusation is 10, and pregnancies lasts a day with 0 negative effects caused by having such a fast or large pregnancies. The wearer can have a partner impregnate them, the wearer impregnates the partner, or the wearer can impregnate thenself.
3. Some level of regenerative properties that regenerate the body to pristine condition from any inflicted damage past or present, the only exception to this are fatal attacks to the heart or head, surprisingly though a broken neck is not considered fatal for some reason, also the wearer can sustain themselves off of anything even rocks and only need to sleep 2 hours a day nor do they produce bodily waste. This regeneration could be the reason for such a high fertility survivability and has been seen to be temporarily available to partners impregnated by the wearer.
4. The crown also has some transformative properties to it that it bestows onto the wearer, these changes are permanent even after the crown is removed safely. The changes usually entail a fully functional female hermaphrodite body regardless of wearers original gender, in other words a futanari. Height is increased at around 7 feet even if the wearer wasn't already that tall. A body that is both peak femininity to resemble a fertility goddess but also peak physically might and agility. And lastly a fleshy tail that is roughly 3 feet in length and completely prehensile that also functions as another sex organ, specifically an ovipositor. Removal of clothing is advised even though the crown perfectly fit the the wearer even after being changed, one's current wardrobe does not have the same benefits and will become immediately torn and shreaded upon transformation.
5. This artifact has an odd synergy with the collar of echidna and the asura armlets.

"Now with that said if you wish to use this artifact please use it with the upmost care as after all great power comes with a great responsibility or you risk losing yourself to the power the artifact provides."

After that entire explination of the crowns effects and the final warning of it Yang subconsciously holds her prosthetic arm and she feels like the crown is calling out to her to put it on and feels a burning need in her core.