"Allen, and that thing you mentioned just now... what was it? Oh, right, if it's complicated, you can come find me later and fill me in." Sirius Black chose his words carefully. He did not want Harry to know he would be going to fight You-Know-Who, even if it was a You-Know-Who whose spellcasting ability was not quite so formidable. And feeling that he had once again received a favor from Allen, he hurriedly hinted to Allen that he could tell him afterward.
"Oh, it's nothing complicated." Allen understood Sirius Black's concern. He gave Harry a slight nod, his tone very polite. "But since Harry has been called over... sorry, Harry. This is a little sudden, but what comes next has to do with your relatives in the Muggle world, so I thought it would be better for you to be present."
Then, under the puzzled gazes of godfather and godson, Allen casually told them about his experiment that could allow Squibs and Muggles to gain the ability to cast magic.
The eyes behind Harry's large glasses blinked rapidly. He found what he had just heard hard to believe, while Sirius Black beside him seemed completely stunned. Unlike Harry, he knew very clearly what it meant to let Squibs cast spells. This had made history. No one had ever done it before.
What made it even harder for Sirius Black to accept was that, even though he already knew that unreliable Crazy Girl was Ravenclaw herself, after having met Luna several times, he still could not believe that this mad little Witch and Allen could actually do something so enormous, could actually make people who could not cast magic become wizards. Every family had produced Squibs; this was unavoidable. As for relatives in one's own family being unable to cast