Check their wounds

After the encounter, the two girls took some time to catch their breath. "Are you allright? Meghan asked Yvette. "I think i'm okay. That hurt like hell but i don't think it did any serious lasting damage. My clothes are ruined though..." Yvette inspected the tattered remains of her beautiful mage robes. "Are you sure?" Meghan asked pointing at her older sisters reddened nipples. "Did it just pierce your nipples?" Looking down Yvette felt her sore boobs and noticed the new silver jewellery. "What the fuck?! That son of a bitch" Yvette tried to remove them but the darned things had no openings and were going nowhere. "These seem magical... Let's take a moment and i'll identify them."

The pair sat down and Meghan had a sandwich while Yvette sat down in her underwear, pulling a pearl from her component pouch and started rubbing it over the nipple piercings. Revealing their magical nature:

Nipple Piercings of Arcane Focus:
These ring piercings redirect the wearer's arousal towards their spellcasting. Significantly increasing sensitivity on the area they are placed, and focusing that energy into the wearer's spells.
Curse: These piercings can only be removed once the wearer has had 10 orgasms.

"Why would anyone have these?! Let alone a skeleton?" Yvette exclaimed after finishing the ritual. "They seem somewhat beneficial however, even though that curse is a bit weird."

"Let's find a way through this place." Meghan tried to encourage her sister "Once we get out we'll use some of the money to remove the curse in town."