After purifying the Gray Fog in two places, the two Purification Orbs he had made earlier had also been used up.
Matthew returned to the Hogwarts World. During the summer holiday, he still had one matter to attend to.
Previously, in the Headmaster's Office at Hogwarts, he had made an arrangement with Phineas Black's portrait to visit the Black family's ancestral home—12 Grimmauld Place.
Phineas Black seemed to want to rearrange matters regarding the Black family's heir.
"Preserved Egg—" Matthew called toward the attic, where Preserved Egg's room was located.
A head poked out from the attic. "Meow?"
"Come down. We're heading out."
"Meow!" Instead of taking the stairs, the black cat leaped straight down. That height posed no obstacle to a black cat, and it landed steadily on the ground.
After landing, the black cat sprang up again and jumped onto Matthew's shoulder.
"Hold tight." Matthew Waved His Wand. Space twisted, and the man and cat in the living room vanished in an instant.
When he appeared again, he was in a Muggle neighborhood in London, very close to Grimmauld Place.
After turning through two streets, Matthew arrived before a row house marked 11 Grimmauld Place. The house beside it was 13 Grimmauld Place, but there was no sign of 12 Grimmauld Place.
Matthew knew that 12 Grimmauld Place had been concealed by a spell. He walked to the point between houses number 11 and 13 and quietly recited an incantation.
A crack immediately split open between number 11 and number 13, slowly forcing them apart.
A moment later, a door appeared between number 11 and number 13. Written upon it were the words—12 Grimmauld Place.
After entering 12 Grimmauld Place, the first thing he saw was a dimly lit entrance hall corridor. On the Left Side was a