"It depends on how big your place is," said Phibrizzo. "And how much damage it already has from the Darkness. Most apartments without a lot of Darkness damage will be about fifty to one hundred dollars to Darkness proof. We'll also do check ups on the Darkness proofing to make sure everything is in good condition and to repair anything that needs it."

Regular maintenance of the Darkness proofing was why he was allowed to live at the Uzushio for free without question. The inn needed to look spotless and fresh, uncorroded by the rotting Darkness.

"Tennis is...close," Phibrizzo replied with a little laugh. "It's kind of like a cross between tennis and boxing. You're supposed to to try to knock your opponent over with the ball."