After returning from the Black family, Voldemort's life settled down completely.
He spent several days studying the Black Family's Magic Book.
It contained records of many unique kinds of magic, as well as unusual analyses of many common spells.
But none of it impressed Voldemort—until he came across a chapter called the Black Family's Magic Canister.
In essence, it was not even magic, but simply a way of applying magical power.
What surprised Voldemort was that it had a touch of science to it.
Of course, the Black Ancestor who invented this spell had never read any Muggle books.
Although every two generations or so, the family produced a rebel like Sirius Black,
the fact was that most of them were deeply hostile toward Muggles.
And this Black Ancestor had indeed been one of those who hated Muggles, yet he had discovered "science" on his own.
Through observation, he had realized that burning the same amount of charcoal in a stove was far more efficient than lighting a fire directly on the ground.
So he had tried to apply this remarkable discovery to magic.
Invent a spell?
No need.
In the era when the Black Ancestor had lived, Magic Circuits had not yet become high-level magic.
So he had worked directly on the Magic Circuits; it was much simpler than using magic on himself.
And he did not have to worry about how long the magical effect would last.
Thus, the Black Family's Magic Canister was born, and Voldemort eagerly tried it out.
Because his body was made of magic, the results were exceptionally good.
Especially after he had used that Eternal Magic to forge the power circuits into bottles.
Not only did using magic consume less power, but the spells also became slightly more powerful.
"Here's the new lesson: