However, Joan of Arc was originally summoned because Cao Tian wanted to destroy (redeem) all mankind and began to implement it. Because this has involved the survival of all mankind, it triggered suppression, which summoned an arbitrator with network management authority to stop the grass, and Joan of Arc was summoned from this. So, in essence, Joan came to the grass. Therefore, there is no such thing as a black whistle. Joan of Arc killed grass at a higher level (not limited to the Holy Grail War).