Sirius in Harry Potter was killed by what spell?

In the Department of Mysteries, Bellatrix's spell really hit him. But it's not the deadly death curse "Abada Death Curse". This book just writes:

"The second beam hit him in the chest."

In this context, this beam should be just an ordinary red light, that is, an offensive spell similar to fainting. Sirius also showed an expression of "fear and surprise" when he fell backwards. It can be seen that he was not dead at that time, but what really shocked him was what he might touch and cross after falling-curtains.

What kind of mystery is that curtain?

Arches and curtains stand in a room of the Department of Mysteries, which Dumbledore called the "Death Room". There is a huge stone pit in the death room, surrounded by stone steps, and the arch is on a protruding stone platform in the center of the stone pit. There is no fence around the archway, and there is a tattered black curtain hanging on the door. Although the air in the room is cold and windless, the curtains are swaying gently, "as if they have just been touched."

In fact, it is inaccurate for People's Literature Publishing House to translate that room into a death penalty room. The Department of Mysteries is a department set up by the Ministry of Magic to study and explore twelve unsolved mysteries in the magical world. A room full of strange clocks is used to study time, a hall full of brain glass water tanks is used to study thoughts, and a room full of prophecy balls is used to study the future. A dark room with floating planets should be used to study the universe. In the original English text, the room where Sirius died was the house-in Nick's almost mindless words-where "scholars of the Department of Mysteries" studied the "secret of death", and arches and curtains were the media or tools for them to study death. Harry and Luna can see thestrals because they both see death on the basis of understanding it. Similarly, they think someone is whispering behind the arch and there is someone in the curtain.

In the conversation between Harry and Luna on the last day of that school year, Luna said that the dead were "just hiding out of our sight", and the sound Harry and Luna heard in the room with arches was the voice of the dead.

According to these, we can judge that the arch is the gateway to the underworld, and that curtain separates the world of life and death. On the one hand, the world of death in which we live, and on the other hand, the mysterious underworld, are gone forever.

Therefore, when Sirius passes through the veil, Bellatrix will scream proudly, and Lu Bang will hold Harry who rushed to the veil excitedly, so as not to let him touch the strange thing that took away the godfather, and intermittently say, "He can't come back, Harry, he can't come back, he's dead-"-see Baidu Post Bar.