Dota reasoning!!! Is there anyone who plays Dota? (Answer revealed at midnight)

Alibi \“Damn it, even my slow-down effect has no real impact on him. How is this person so strong?” Huguang gasped for breath as he fled, feeling waves of chill in his heart. He had originally hoped to create some distance from the killer, but it seemed to have little effect. The flash of his Ghost Strike didn't seem to intimidate the opponent at all, and soon, he was killed by the adversary… \The Seer received a report and, after a detailed investigation, determined that the crime occurred around 7:30 a.m. They also identified several suspects. Meanwhile, the Seer noticed that Huguang had no wounds from a weapon, indicating that he was killed by the killer using bare hands. Below are the statements of each suspect. \Di Bu: “At 7:30 I happened to be buying things at the grocery store. You can ask there; also, several of my brothers were exercising early in the park, you can check that too.” The Seer sent people to verify this. \Bat: “I was at home all the time and went to the weapons store at 8. The store owner can testify for me. My home is far from Guguang's place, and the road is difficult, it takes at least 40 minutes to get there.” The Seer's assistants tried it and took 45 minutes. \Hei Xian: “I drank with Water Man last night until around 7 in the morning. Later, Water Man said he had things to do and left. I was a little dizzy and went straight to sleep.” \Water Man: “I left Hei Xian's house after 7 a.m. and went to the wild zone to farm. Light Mage can testify for me. His home is not far from the wild zone, and I arranged for him to pull me over at 7:20. I farmed there the whole time.” The Seer learned that the wild zone is quite far from the crime scene, and Water Man could not have reached the scene within 10 minutes. Assistants also reported: “Although Light Mage didn't farm together with Water Man, he did visit Water Man at his home.” \Night Demon: “I stayed home with my girlfriend and didn't go out.” Seer: “Did you cause it to suddenly get dark at 7:20?” Night Demon: “Oh, yes, my girlfriend said she wanted to see the night view, so I used my ultimate.” \Phantom Assassin: “Around 7:30 I was also in the park. I even saw Di Bu's four brothers, someone should be able to confirm.” However, the Seer asked many people, and even Di Bu said he didn't see PA. The Seer thought carefully for a while, finally discovered the problem, and found the real culprit.