Kiraku had set cross-legged in the middle of the training room, scrolls, books and parchments strewn all around him. Marks ran along nearly all of the parchments, marking who pages of interest to him. He had been up before the early rays of the sun had descended upon Sunagakure no Sato, reading through the darkness in the light of bare flames. He had finally found it.
It had all started when he kept finding references to beasts of battle that could be transported to battle with the use of ninjutsu. Further reading had brought him more insight, even a basic grasp of what a Sage mode was, Yet, scroll after scroll and book after book, he could not find were these powers were gained. There was mention of how to perform a so-called "Summoning Technique" yet it seemed to require a contract of sorts, with whom he was not sure.