Lumos was a spell Hogwarts first-years had to master in Defense Against the Dark Arts. It was taught there rather than in Charms because of its ability to drive away dark creatures.
Pomona sat upright in the hot water, lifting her face above the surface.
She was in the Hogwarts teachers' bathroom, which, unlike the Prefects' Bathroom, was decorated in red sandstone tones, with marble floors. It was said to have been modeled after the baths of Pompeii.
There were no Mermaids in the floor-to-ceiling windows here, but there was a mural, its painted figures dancing to music.
Tarantallegra was likewise a required spell for first-years. They only needed to make a pear dance across a table. It was meant to commemorate a wizard who had used the spell to make a volcano dance, after which Pompeii vanished. The city was not excavated until the eighteenth century, and Hogwarts's teachers' bathroom had also been renovated during the installation of its plumbing, becoming what it was today.
Before the soaking made her dizzy, she left the pool by the underwater steps and reached the edge.
A proper ancient Roman bath would have had someone there to give massages at this hour, but the teachers' bathroom had not been built like this for enjoyment.
According to Langley's investigation records—Langley being the owner of those dry bones—the space behind the mirror contained not only Inferi and Devil's Snare, but other dark creatures as well. Yet he had not died from an attack by dark creatures.
Lumos had not yet been invented in his era. Like most wizards, he had chosen fire to deal with the Inferi and Devil's Snare, causing the flames to spread rapidly through the tunnel.
At first, he had worried that the oxygen would be used up. But before he