I think it's better that way than fighting with an actual person.
[He nods] Back home I have many people to protect. That was- is my resolution. [Tsuna closes his eyes a moment, concentrating on the state of his body, before he opens them again] It is if I stay in it for too long, because this energy is connected to my life force. In this place the time it takes to exhaust my body is a lot shorter.