On to the next step of the plan!
Looking as Ryoku made his move, and the many shinobi followed his and Eiji's orders to attack the beast hidden in the mist, she was sure that she could initiate the sealing in a few moments. But then she noticed the mist was dispersed by the many water attacks, which, in turn, revealed the Yonbi was gone. She looked with wide open eyes all around before the giant hands of the Yonbi came out, sending many shinobi flying and watched, without being able to do anything, as several shinobi were also grabbed by the red hands of the Yonbi.
She bit her finger, wiped the blood on her hand and formed a few seals before summoning an owl, which quickly went and moved to her shoulder. It did a 360 spin with its head, looking all around and understanding that the situation is dire "How can I assist, Miwa-chan?" He asked her in a low voice, and she looked at the scattered around the Yonbi's legs. Hoshi bit her lips, not managing to spot the man she was looking for "I need you to find Eiji-sama and tell him to create as many explosive clones as he can. Tell him to send all clones but two towards the head, and either I will send a fire attack towards the clones to make them explode and distract the Yonbi, or the Yonbi himself will cause them to explode, creating the distraction on his own." She said, and Hotori nodded, before focusing his head on the many shinobi around the Yonbi.
"Tell him to send the two remaining clones to stand next to the Yonbi's legs, from behind. The moment I spot them, I will come and give them the order to explode. This is a mere attempt at making the beast fall down. I need to try and buy as much time as I can for the sealing team to be capable of doing what they need to do. If the beast sees this, it can try and interfere, so I want its attention to be focused on the many shinobi all around him. Any other tactic Eiji can come up with will be good. After you tell Eiji, inform Ryoku of my plan. I will be trying to serve as a distraction as well, and a closed ranged one." Hoshi finished speaking, and Hotori nodded once more before taking off with quite the speed, looking between the faces of the shinobi, attempting to find Eiji Emiya among them.
Hoshi looked behind her with a very serious face "Sealing team, begin the sealing as soon as I take off. Yoshikuni, don't worry and trust them. They know what they are doing well." She said and then quickly took off, going in the direction of the Yonbi.
As soon as she was about 10 meters from the Yonbi's feet, she formed a few seals and then begun running around, knowing that because the Yonbi is a beast made solely from chakra, the genjutsu will take effect, weak as it may be. If the beast is able to see through it with ease or not was a different question, but if she manages to get it to stop its chakra flow, then that will be a bonus. She then held the Tiger seal and begun producing a fire wall around the Yonbi, knowing it will not hold for too long due to the water beneath it, but merely waiting to see if Eiji will recieve her message.